@InProceedings{Karavirta:APlus,
  author = {Ville Karavirta and Petri Ihantola and Teemu Koskinen},
  title = {Service-Oriented Approach to Improve Interoperability of e-Learning Systems},
  booktitle = {13th IEEE International Conference on Advanced Learning Technologies},
  year = {To Appear},
  pages = {5}
}
@InProceedings{Karavirta:SpatialJSAV,
  author = {Ville Karavirta},
  title = {Location-Aware Mobile Learning of Spatial Algorithms},
  booktitle = {IADIS International Conference on Mobile Learning 2013},
  year = {To Appear},
  pages = {5}
}
@InProceedings{Karavirta:JSAV,
  author = {Ville Karavirta and Clifford A. Shaffer},
  title = {JSAV: JavaScript Algorithm Visualization Library},
  booktitle = {ACM SIGCSE Conference on Innovation and Technology in Computer Science Education},
  year = {To Appear},
  pages = {6}
}
@InProceedings{Helminen:ParsonsFeedback,
  author = {Juha Helminen and Satu Alaoutinen and Petri Ihantola and Ville Karavirta},
  title = {How Do Students Solve Parsons Programming Problems? -- Execution-based vs. line-based feedback},
  booktitle = {Learning and Teaching in Computing and Engineering},
  year = {To Appear},
  pages = {7}
}
@InProceedings{Karavirta:JSAVHeaps,
  author = {Ville Karavirta and Ari Korhonen and Otto Sepp\"{a}l\"{a}},
  title = {Misconceptions in Visual Algorithm Simulation Revisited: On UI's Effect on Student Performance, Attitudes, and Misconceptions},
  booktitle = {Learning and Teaching in Computing and Engineering},
  year = {To Appear},
  pages = {8}
}

@InProceedings{Karavirta:MobileParsons,
  author = {Ville Karavirta and Juha Helminen and Petri Ihantola},
  title = {A Mobile Learning Application for Parsons Problems with Automatic Feedback},
  booktitle = {Proceedings of the 12th Koli Calling International Conference on Computing Education Research},
  year = {2012},
  url = {http://dl.acm.org/authorize?6860241},
  pages = {11--18}
}

@InProceedings{Karavirta:BSTAcceleration,
  author = {Ville Karavirta and Lasse Hakulinen},
  title = {Educational Accelerometer Games for Computer Science},
  booktitle = {Proceedings of the 11th World Conference on Mobile and Contextual Learning},
  year = {2012},
  pages = {216--219},
  url = {http://ceur-ws.org/Vol-955/papers/paper_28.pdf}
}
@InProceedings{Helminen:ParsonAnalysis,
  author = {Juha Helminen and Petri Ihantola and Ville Karavirta and Lauri Malmi},
  title = {How Do Students Solve Parsons Programming Problems? -- An Analysis of Interaction Traces},
  booktitle = {Proceedings of the 8th International Computing Education Research Conference},
  year = {2012},
  pages = {119--126},
  url = {http://dl.acm.org/authorize?6724413},
  address = {Auckland, New Zealand}
}

@InProceedings{Koskinen:WPSecurity,
  author = {Teemu Koskinen and Petri Ihantola and Ville Karavirta},
  title = {Quality Of WordPress Plug-Ins: An Overview of Security and User
Ratings},
  booktitle = {Proceedings of the Third International Workshop on Security and Privacy in Social Networks},
  year = {2012},
  pages = {4},
address = {Amsterdam, Netherlands},
url = {villekaravirta.com/files/SPSN2012-quality-of-wordpress-plugins.pdf}
}
@inbook{Karavirta:MapsBook,
  author = {Ville Karavirta and Ari Korhonen},
  chapter = {Visual Algorithm Simulation Exercises with Authentic Data Sets},
  title = {Towards Learning and Instruction in Web 3.0: Advances in Cognitive and Educational Psychology},
  publisher = {Springer Verlag},
  year = {2012},
  editor = {P. Isaias, D. Ifenthaler, Kinshuk, D.G. Sampson, and J.M. Spector},
  pages = {123--137},
  address = {New York, NY, USA},
  url = {http://dx.doi.org/10.1007/978-1-4614-1539-8_8}
}
          @inproceedings{Shaffer:OpenDSA,
            author = {Clifford A. Shaffer and Ville Karavirta and Ari Korhonen and Thomas L. Naps},
            title = {OpenDSA: Beginning a Community Active-eBook Project.},
            booktitle = {Proceedings of the 11th Koli Calling International Conference on Computing Education Research},
            year = {2011},
            pages = {112--117},
            location = {Joensuu, Finland},
            url = {http://dl.acm.org/authorize?6537598}
          }
          @inproceedings{Karavirta:MobilePerspectives,
            title = {Perspectives on Algorithm Visualization on Mobile Devices},
            author = {Ville Karavirta},
            year = {2011},
            booktitle = {Proceedings of the Sixth Program Visualization Workshop},
            pages = {59--65},
            address = {Darmstadt, Germany}
          }
          @inproceedings{Karavirta:InitialAVServices,
            title = {Initial Set of Services for Algorithm Visualization},
            author = {Ville Karavirta and Petri Ihantola},
            year = {2011},
            booktitle = {Proceedings of the Sixth Program Visualization Workshop},
            pages = {67--71},
            address = {Darmstadt, Germany}
          }
          @inproceedings{Ihantola:VisualFeedback,
            title = {Automated Visual Feedback from Programming Assignments},
            author = {Petri Ihantola and Ville Karavirta and Otto Sepp\"{a}l\"{a}},
            year = {2011},
            booktitle = {Proceedings of the Sixth Program Visualization Workshop},
            pages = {87--95},
            address = {Darmstadt, Germany}
          }
          @article{Ihantola:Parsons,
          title = {Two-Dimensional Parson's Puzzles: The Concept, Tools, and First Observations},
          journal = {Journal of Information Technology Education: Innovations in Practice},
          volume = {10},
          pages = {1--14},
          year = {2011},
          author = {Petri Ihantola and Ville Karavirta},
          url = {http://www.jite.org/documents/Vol10/JITEv10IIPp119-132Ihantola944.pdf}
          }

@InProceedings{Karavirta:JSPoster,
  author = {Ville Karavirta and Petri Ihantola},
  title = {Serverless Automatic Assessment of JavaScript Exercises},
  booktitle = {ITiCSE '10: Proceedings of the 15th annual ACM SIGCSE conference on Innovation and technology in computer science education},
  year = {2010},
  isbn = {978-1-60558-729-5},
  pages = {302--302},
  location = {Bilkent, Ankara, Turkey},
  doi = {http://doi.acm.org/10.1145/1822090.1822178},
  url = {http://dl.acm.org/authorize?367582},
  publisher = {ACM},
  address = {New York, NY, USA}
}

@InProceedings{Ihantola:ParsonPoster,
  author = {Petri Ihantola and Ville Karavirta},
  title = {Open Source Widget for Parson's Puzzles},
  booktitle = {ITiCSE '10: Proceedings of the 15th annual ACM SIGCSE conference on Innovation and technology in computer science education},
  year = {2010},
  isbn = {978-1-60558-729-5},
  pages = {302--302},
  location = {Bilkent, Ankara, Turkey},
  doi = {http://doi.acm.org/10.1145/1822090.1822178},
  url = {http://dl.acm.org/authorize?367581},
  publisher = {ACM},
  address = {New York, NY, USA}
}

@inproceedings{Korhonen:TRAKLA2Tool,
  responsibleauthor = "Korhonen, Ari",
  editor = "Pears, Arnold and Schulte, Carsten",
  author = "Ari Korhonen and Juha Helminen and Ville Karavirta and Otto Seppälä",
  comment = "Conference: 9th Koli Calling International Conference on Computing Education Research, Koli, Finland, October 29 – November 1, 2009",
  month = "November",
  pages = "43--46",
  address = "Uppsala University",
  publisher = "University of Joensuu",
  year = "2010",
  issn = "1404-3203",
  title = "TRAKLA2",
  booktitle = "Proceedings of the 9th Koli Calling International Conference on Computing Education Research",
  url = "http://www.it.uu.se/research/publications/reports/2010-027/2010-027.pdf"
}
@inproceedings{Ihantola:AASurvey,
 author = {Petri Ihantola and Tuukka Ahoniemi and Ville Karavirta and Otto Sepp\"{a}l\"{a}},
 title = {Review of recent systems for automatic assessment of programming assignments},
 booktitle = {Proceedings of the 10th Koli Calling International Conference on Computing Education Research},
 series = {Koli Calling '10},
 year = {2010},
 isbn = {978-1-4503-0520-4},
 location = {Berlin, Germany},
 pages = {86--93},
 numpages = {8},
 url = {http://dl.acm.org/authorize?452133},
 doi = {http://doi.acm.org/10.1145/1930464.1930480},
 acmid = {1930480},
 publisher = {ACM},
 address = {New York, NY, USA},
}

@inproceedings{Karavirta:GMaps,
  author = {Ville Karavirta},
  title = {Real-World, Student Selectable Data for Education -- Learning graph Algorithms},
  year = {2010},
  booktitle = {Proceedings of the IADIS International Conference Cognition and Exploratory Learning in Digital Age},
  pages = {129--136},
  address = {Timisoara, Romania},
  month = {October},
url = {http://www.iadisportal.org/digital-library/real-world-student-selectable-data-for-education-learning-graph-algorithms}
}

@InProceedings{Karavirta:JSAssess,
  author = {Ville Karavirta and Petri Ihantola},
  title = {Automatic Assessment of JavaScript Exercises},
  keywords = {automatic assessment
javascript},
  booktitle = {Proceedings of 1st Educators' Day on Web Engineering Curricula (WECU 2010)},
  year = {2010},
  publisher = {CEUR-WS.org},
  OPTeditor = {},
  edition = {},
  address = {Vienna, Austria, July 6, 2010},
  OPTvolume = {},
  OPTnumber = {},
  pages = {1-10},
  OPTmonth = {},
  OPTnote = {},
  url = {http://ceur-ws.org/Vol-607/paper9.pdf}
}

@article{Karavirta:JVLCTaxonomy,
title = {A comprehensive taxonomy of algorithm animation languages},
journal = {Journal of Visual Languages \& Computing},
volume = {20},
number = {1},
pages = {1--22},
year = {2010},
issn = {1045-926X},
doi = {DOI: 10.1016/j.jvlc.2009.09.001},
url = {http://www.sciencedirect.com/science/article/B6WMM-4XBR4NN-1/2/32dd4b4e05e9eca125e9600b9fc235f7},
author = {Ville Karavirta and Ari Korhonen and Lauri Malmi and Thomas Naps}
}

@InProceedings{Ahoniemi:Analyzing,
  author = {Tuukka Ahoniemi and Ville Karavirta},
  title = {Analyzing the use of a rubric-based grading tool},
  keywords = {Grading, Rubrics, Programming, Assessment, Mass courses},
  booktitle = {ITiCSE '09: Proceedings of the 14th annual ACM SIGCSE conference on Innovation and technology in computer science education},
  year = {2009},
  publisher = {ACM},
  edition = {},
  pages = {333--337},
  url = {http://dl.acm.org/authorize?115694}
}

@InProceedings{Auvinen:RubyricPoster,
  author = {Tapio Auvinen and Ville Karavirta and Tuukka Ahoniemi},
  title = {Rubyric: an online assessment tool for effortless authoring of personalized feedback},
  keywords = {Rubrics, Assessment, Feedback, Large Courses, Rubyric},
  booktitle = {ITiCSE '09: Proceedings of the 14th annual ACM SIGCSE conference on Innovation and technology in computer science education},
  year = {2009},
  publisher = {ACM},
  edition = {},
  pages = {377},
  url = {http://dl.acm.org/authorize?115634}
}

@Article{Karavirta:Merging,
  author = {Ville Karavirta},
  title = {Seamless Merging of Hypertext and Algorithm Animation},
  journal = {ACM Transactions on Computing Education (TOCE)},
  year = {2009},
  publisher = {ACM},
  address = {New York, NY, USA},
  edition = {},
  volume = {9},
  number = {2},
  pages = {1--18},
  url = {http://dl.acm.org/authorize?172837}
}

@PhdThesis{Karavirta:Doctoral,
  author =   {Ville Karavirta},
  title =  {Facilitating Algorithm Visualization Creation and Adoption in Education},
  organization = {Department of Computer Science and Engineering},
  school =   {Helsinki University of Technology},
  year =   {2009},
  type =   {Doctoral Dissertation (Research Rep. No. TKK-CSE-A3/09)},
  url = {http://lib.tkk.fi/Diss/2009/isbn9789522481702/isbn9789522481702.pdf}
}

@TechReport{Karavirta:XaalSlides,
  author = {Ville Karavirta and Guido R\"o\ss{}ling and Otto Sepp\"{a}l\"{a}},
  title = {Automatic Generation of Algorithm Visualizations for Lectures},
  year = {2009},
  institution = {Helsinki University of Technology, Department of Computer Science and Engineering},
  url = {http://www.cse.tkk.fi/en/publications/B/7/cse-b7.pdf},
  edition = {},
  type = {Technical Report},
  number = {TKK-CSE-B7},
  pages = {11},
}

@inproceedings{Seppala:AASlides,
 author = {Otto Sepp\"{a}l\"{a} and Ville Karavirta},
 title = {Work in Progress: Automatic Generation of Algorithm Animations for Lecture Slides},
 booktitle = {Proceedings of the Fifth Program Visualization Workshop (PVW 2008) in Electronic Notes in Theoretical Computer Science, 224},
 year = {2009},
 issn = {1571-0661},
 pages = {97--103},
 url = {http://dx.doi.org/10.1016/j.entcs.2008.12.053},
 publisher = {Elsevier Science Publishers B. V.},
 address = {Amsterdam, The Netherlands, The Netherlands}
}

@inproceedings{Karavirta:TowardsMerging,
title = {Towards Seamless Merging of Hypertext and Algorithm Animation},
booktitle = {Proceedings of the Fifth Program Visualization Workshop (PVW 2008) in Electronic Notes in Theoretical Computer Science, 224},
pages = {105--114},
year = {2009},
note = {Proceedings of the Fifth Program Visualization Workshop (PVW 2008)},
issn = {1571-0661},
doi = {DOI: 10.1016/j.entcs.2008.12.054},
url = {http://dx.doi.org/10.1016/j.entcs.2008.12.054},
author = {Ville Karavirta},
keywords = {Algorithm animation},
keywords = {online learning},
keywords = {merging of hypertext and algorithm animation},
keywords = {Xaal}
}

@Article{Karavirta:TktXaal,
  author = {Ville Karavirta},
  title = {Mit\"a saavutettaisiin  algoritmianimaatiokielistandardilla?},
  journal = {Tietojenk\"asittelytiede},
  keywords = {algorithm animation, xaal, algorithm animation language},
  year = {2008},
  publisher = {},
  edition = {},
  volume = {0},
  number = {28},
  pages = {15--30},
  url = {http://www.cse.tkk.fi/fi/tkt-lehti/a28/karavirta.pdf}
}
@article{Sorva:RolesInTeaching,
   author = {Juha Sorva and Ville Karavirta and Ari Korhonen},
    title = {Roles of Variables in Teaching},
  journal = {Journal of Information Technology Education},
   volume = {6},
     year = {2007},
    pages = {407--423},
      url = {http://jite.org/documents/Vol6/JITEv6p407-423Sorva280.pdf}
}

@InProceedings{Karavirta:integration,
  author =   {Ville Karavirta},
  title =    {Integrating Algorithm Visualization Systems},
  booktitle = {Proceedings of the Fourth Program Visualization Workshop (PVW 2006)},
  pages =    {79--87},
  year =   {2007},
  volume =   {178},
  series =   {Electronic Notes in Theoretical Computer Science },
  month =    {4 July 2007},
 url = {http://dx.doi.org/10.1016/j.entcs.2007.01.030}
}

@InProceedings{Karavirta:hecse2007,
  author = {Ville Karavirta},
  title = {Algorithm Visualizations as Interactive Learning Material},
  keywords = {algorithm visualization, algorithm animation, learning, interaction},
  booktitle = {},
  year = {2007},
  publisher = {},
  edition = {},
  address = {Annual Hecse Poster Session, Helsinki, Finland, May 28 - June 1, 2007},
  pages = {95},
  url = {}
}

@MastersThesis{Karavirta:Licentiates,
  author =   {Ville Karavirta},
  title = {Facilitating Algorithm Animation Creation and Adoption in Education},
  type = {Licentiate's Thesis},
  organization = {Department of Computer Science and Engineering},
  school = {Helsinki University of Technology},
  year = {2007},
  month =    {December},
  url = {http://www.cs.hut.fi/Research/SVG/publications/karavirta-lis.pdf}
}

@InProceedings{Karavirta:tktpxaal,
  author = {Ville Karavirta},
  title = {XAAL - Extensible Algorithm Animation Language},
  keywords = {algorithm visualization, algorithm animation, algorithm animation language, xaal},
  booktitle = {Tietojenk\"{a}sittelytieteen p\"{a}iv\"{a}t},
  year = {2007},
  publisher = {Jyv\"{a}skyl\"{a}n Yliopisto, Tietojenk\"{a}sittelytieteiden laitos},
  editor = {Minna Koskinen, Eliisa Jauhiainen},
  edition = {},
  address = {Jyv\"{a}skyl\"{a}, 31.5. - 1.6.2007},
  pages = {20--25},
  url = {}
}
@InProceedings{Karavirta:AALTaxonomy,
  author =   {Ville Karavirta and Ari Korhonen and Lauri Malmi},
  title =    {Taxonomy of Algorithm Animation Languages},
  booktitle = {SoftVis '06: Proceedings of the 2006 ACM symposium on Software visualization},
  isbn = {1-59593-464-2},
  pages = {77--85},
  location = {Brighton, United Kingdom},
  publisher = {ACM Press},
  address = {New York, NY, USA},
  year =   {2006},
  month =    {September},
  url = {http://dl.acm.org/authorize?813987}
}

@InProceedings{Karavirta:tktp,
  author =   {Ville Karavirta},
  title =    {Algoritmianimaatioj\"{a}rjestelmien tiedonvaihto},
  booktitle = {Tietojenk\"{a}sittelytieteen p\"{a}iv\"{a}t 2006},
  pages =    {25--30},
  year =   {2006},
  editor =   {Lea Kutvonen and P\"{a}ivi Kuuppelom\"{a}ki},
  address =    {Helsinki, Finland},
  organization = {Helsingin Yliopisto, Tietojenk\"{a}sittelytieteen laitos}
}

@article{Roessling:VizCoSH,
 author = {Guido R\"o\ss{}ling and Thomas Naps and Mark S. Hall and Ville Karavirta and Andreas Kerren and Charles Leska and Andr\'es Moreno and Rainer Oechsle and Susan H. Rodger and Jaime Urquiza-Fuentes and J. \'Angel Vel\'azquez-Iturbide},
 title = {Merging interactive visualizations with hypertextbooks and course management},
 journal = {SIGCSE Bulletin},
 volume = {38},
 number = {4},
 year = {2006},
 issn = {0097-8418},
 pages = {166--181},
 url = {http://dl.acm.org/authorize?848346},
 publisher = {ACM Press},
 address = {New York, NY, USA}
 }

@InProceedings{Karavirta:VirtualTutor,
  author =   {Ville Karavirta and Ari Korhonen},
  title =    {Automatic Tutoring Question Generation During Algorithm Simulation},
  booktitle =  {Proceedings of the 6th Finnish/Baltic Sea
                  Conference on Computer Science Education, Koli Calling},
  year =   {2006},
  pages =    {95--100},
  editor =   {Anders Berglund and Mattias Wiggberg},
 url = {http://dl.acm.org/authorize?921222}
}

@Article{Karavirta:Resubmissions,
  author = {Ville Karavirta and Ari Korhonen and Lauri Malmi},
  title = {On the use of resubmissions in automatic assessment systems},
  journal = {Computer Science Education},
  year = {2006},
  publisher = {Routledge},
  volume = {16},
  number = {3},
  pages = {229--240},
  month = {September},
  url = {http://www.cs.hut.fi/Research/SVG/publications/cse-clustering06.pdf}
}

@article{Naps:XMLWG,
 author = {Thomas Naps and Guido R\"o\ss{}ling and Peter Brusilovsky and John English and Duane Jarc and Ville Karavirta and Charles Leska and Myles McNally and Andr\'es Moreno and Rockford J. Ross and Jaime Urquiza-Fuentes},
 title = {Development of XML-based Tools to Support User Interaction with Algorithm Visualization},
 journal = {SIGCSE Bulletin},
 volume = {37},
 number = {4},
 year = {2005},
 month = {December},
 pages = {123--138},
 publisher = {ACM Press},
 address = {New York, NY, USA},
 url = {http://dl.acm.org/authorize?899739}
 }

@inproceedings{Korhonen:ICER,
  author = {Petri Ihantola and Ville Karavirta and Ari Korhonen and Jussi Nikander},
  title = {Taxonomy of effortless creation of algorithm visualizations},
  booktitle = {ICER'05: Proceedings of the 2005 international workshop on Computing education research},
  year = {2005},
  isbn = {1-59593-043-4},
  pages = {123--133},
  location = {Seattle, WA, USA},
  url = {http://dl.acm.org/authorize?878414},
  publisher = {ACM Press},
  address = {New York, NY, USA}
}

@Article{Malmi:JERIC,
  author =   {Lauri Malmi and Ville Karavirta and Ari Korhonen and Jussi Nikander},
  title =    {Experiences on Automatically Assessed Algorithm Simulation Exercises with Different Resubmission Policies},
  journal =    {Journal of Educational Resources in Computing},
  year =   {2005},
  volume =   {5},
  number =   {3},
  pages =    {1--23},
  month =    {September},
  publisher = {ACM Press},
  address = {New York, NY, USA},
  url = {http://dl.acm.org/authorize?829352}
}

@InProceedings{Karavirta:clustering,
  author =   {Ville Karavirta and Ari Korhonen and Lauri Malmi},
  title =    {Different Learners Need Different Resubmission Policies in Automatic Assessment Systems},
  booktitle = {Proceedings of the 5th Annual Finnish / Baltic Sea Conference on Computer Science Education},
  pages =    {95--102},
  year =   {2005},
  month =    {November},
  url = {http://www.cs.hut.fi/Research/SVG/publications/clustering.pdf},
  organization = {University of Joensuu}
}

@MastersThesis{Karavirta:Masters,
  author =   {Ville Karavirta},
  title =    {{XAAL} - Extensible Algorithm Animation Language},
  organization = {Department of Computer Science and Engineering},
  school =   {Department of Computer Science and Engineering, Helsinki University of Technology},
  year =   {2005},
  type =   {Master's Thesis},
  month =    {December},
  url = {http://www.cs.hut.fi/Research/SVG/publications/karavirta-masters.pdf}
}

@InProceedings{Seppala:MatrixPro,
  author =   {Otto Sepp\"al\"a and Ville Karavirta and Ari Korhonen},
  title =    {MatrixPro - Luentoty\"okalu tietorakenteiden ja algoritmien opetukseen},
  booktitle = {Reflektori 2005 tekniikan opetuksen symposium, 20. - 21.10.2005, Espoo},
  pages =    {1--5},
  year =   {2005},
  editor =   {Anu Yanar},
  publisher = {Opetuksen ja Opiskelun tuki, Teknillinen korkeakoulu, Espoo},
  url = {http://opetuki2.tkk.fi/p/reflektori/verkkojulkaisu/pdf/f7_otto_seppala.pdf}
}

@InProceedings{Karavirta:MatrixPro,
  author =   {Ville Karavirta and Ari Korhonen and Lauri Malmi and Kimmo St\aa{}lnacke},
  title =    {{MatrixPro} - {A} Tool for On-The-Fly Demonstration of Data Structures and Algorithms},
  booktitle = {Proceedings of the Third Program Visualization Workshop},
  pages =    {26--33},
  year =   {2004},
  address =    {The University of Warwick, UK},
  month =    {July},
  url = {http://www.cs.hut.fi/Research/SVG/publications/p04.pdf}
}

@InProceedings{Karavirta:MPPoster,
  author =   {Ville Karavirta and Ari Korhonen and Lauri Malmi and Kimmo St\aa{}lnacke},
  title =    {Matrix{P}ro - A Tool for Demonstrating Data Structures and Algorithms Ex Tempore},
  booktitle = {Proceedings of the 4th IEEE International Conference on Advanced Learning Technologies},
  pages =    {892--893},
  year =   {2004},
  address =    {Joensuu, Finland},
  url = {http://www.cs.hut.fi/Research/SVG/publications/icalt04-matrixpro.pdf}
}

@InProceedings{Karavirta:survey,
  author =   {Ville Karavirta and Ari Korhonen and Petri Tenhunen},
  title =    {Survey of Effortlessness in Algorithm Visualization Systems},
  booktitle = {Proceedings of the Third Program Visualization Workshop},
  pages =    {141--148},
  year =   {2004},
  address =    {The University of Warwick, UK},
  month =    {July},
  url = {http://www.cs.hut.fi/Research/SVG/publications/p20.pdf}
}

@TechReport{Korhonen:MatrixFramework,
  author =   {Ari Korhonen and Lauri Malmi and Panu Silvasti and Ville Karavirta and Jan L\"{o}nnberg and Jussi Nikander and Kimmo St\aa{}lnacke and Petri Ihantola},
  title =  {Matrix - A Framework for Interactive Software Visualization},
  institution =  {Laboratory of Information Processing Science, Department of
                  Computer Science and Engineering, Helsinki University of
                  Technology},
  year =   2004,
  type =   {Research Report},
  number =   {TKO-B 154/04},
  address =  {Finland},
  url = {http://www.cs.hut.fi/Research/SVG/publications/B154.pdf}
}

@Article{Malmi:TRAKLA2,
  author =   {Lauri Malmi and Ville Karavirta and Ari Korhonen and Jussi Nikander and Otto Sepp\"{a}l\"{a} and Panu Silvasti},
  title =    {Visual Algorithm Simulation Exercise System with Automatic Assessment: {TRAKLA2}},
  journal =    {Informatics in Education},
  year =   {2004},
  volume =   {3},
  number =   {2},
  pages =    {267--288},
  url = {http://www.cs.hut.fi/Research/SVG/publications/infoinedu.pdf}
}

@misc{Korhonen:TRAKLA2-URL,
  author = {Ari Korhonen and Lauri Malmi and Panu Silvasti and Jussi Nikander and Petri Tenhunen and Pekka M\aa{}rd and Harri Salonen and Ville Karavirta},
  title = {{TRAKLA2}},
  year = {2003},
  howpublished = {Computer program},
  url = {http://www.cs.hut.fi/Research/TRAKLA2/}
}

@misc{Karavirta:MatrixProProgram,
  author = {Ville Karavirta and Ari Korhonen and Lauri Malmi},
  title = {{MatrixPro}},
  howpublished = {Computer program},
  publisher = {Helsinki University of Technology},
  month = {November},
  year = {2003},
  url = {http://www.cs.hut.fi/Research/MatrixPro/}
}

@inproceedings{Karavirta:effortless,
 author = {Ville Karavirta and Ari Korhonen and Jussi Nikander and Petri Tenhunen},
 title = {Effortless Creation of Algorithm Visualization},
 booktitle = {Proceedings of the Second Annual Finnish / Baltic Sea Conference on Computer Science Education},
 year = {2002},
 pages = {52--56},
 month = {October},
 url = {http://www.cs.hut.fi/Research/SVG/publications/koli02P08.pdf}
}