Y. Mor, J. Tholander, und J. Holmberg. The 10th Computer Supported Collaborative Learning (CSCL) conference (2005), Seite 450 - 459. Taipei, Taiwan, Lawrence Erlbaum Associates, (2006)
J. Matos, Y. Mor, R. Noss, und M. Santos. Fourth Congress of the European Society for Research in Mathematics Education (CERME-4), Sant Feliu de Guíxols, Spain, (2005)
M. Cerulli, A. Chioccariello, und E. Lemut. Proceedings of the Fourth Congress of the European Society for Research in Mathematics Education (CERME 4), Seite 591-600. Sant Feliu de Guíxols, Spain,, (2005)