H. Sehring, S. Bossung, P. Hupe, M. Skusa, and J. Schmidt. Proceedings of the Workshop Information Technologies for Business, International Baltic Conference on Databases and Information Systems, Baltic DB&IS 2006, Vilnius, Lithuania, page 39-51. IEEE, (2006)
M. Knapp, S. Dexter, and R. Mclaughlin. WWW Alt. '04: Proceedings of the 13th international World Wide Web conference on Alternate track papers & posters, page 410--411. New York, NY, USA, ACM Press, (2004)
M. Nurminen, and J. Itkonen. Concept Mapping - Connecting Educators. Proceedings of the 3rd International Conference on Concept Mapping. Volume III. Poster papers, page 202-205. IHMC, (2008)
M. Nurminen, and J. Itkonen. Concept Mapping - Connecting Educators. Proceedings of the 3rd International Conference on Concept Mapping. Volume III. Poster papers, page 202-205. IHMC, (2008)