M. Cerulli, A. Chioccariello, and E. Lemut. 5th CERME conference - congress of European Society for Research in Mathematics Education, Larnaca, Cyprus, (2007)
Y. Mor, J. Tholander, and J. Holmberg. The 10th Computer Supported Collaborative Learning (CSCL) conference (2005), page 450 - 459. Taipei, Taiwan, Lawrence Erlbaum Associates, (2006)
N. Mousoulides, and G. Philippou. Proceedings of the Fourth Congress of the European Society for Research in Mathematics Education, page 1061-1070. (2005)
M. Cerulli, A. Chioccariello, and E. Lemut. Proceedings of the Fourth Congress of the European Society for Research in Mathematics Education (CERME 4), page 591-600. Sant Feliu de Guíxols, Spain,, (2005)
Y. Mor, and E. Sendova. History and Education in Mathematics and Informatics, Attracting Talent to Science; Proceedings of the International Congress MASSEE 2003, september 15-21, Borovets, Bulgaria, University of Latvia, Latvia, (2003)