A. Sacristán. Representations and Mathematics Visualization. Working Group Representations and Mathematics Visualization (1998-2002), North American Chapter of the International Group for the Psychology of Mathematics Education, Seite 127-142. (2002)
E. Yackel, und P. Cobb. Nineteenth International Conference for the Psychology of Mathematics Education, Seite 264-271. Recife, Brazil, Program Committee of the 19th PME Conference, (1995)
D. Küchemann, und C. Hoyles. The Fourth Conference of the European Society for Research in Mathematics Education (CERME 4), Seite 438 - 447. Spain, (2005)
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)
Y. Mor, und 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)