V. Vassilev, J. Miller, and T. Fogarty. Proceedings of the Congress on Evolutionary
Computation, 2, Mayflower Hotel, Washington D.C., USA, IEEE Press, (6-9 July 1999)
P. Singer, D. Helic, A. Hotho, and M. Strohmaier. International Conference on World Wide Web, page 1003--1013. Republic and Canton of Geneva, Switzerland, International World Wide Web Conferences Steering Committee, (2015)
M. Sasman, A. Olivier, and L. Linchevski. Fifth Annual Congress of the Association for Mathematics Education of South Africa, 1, page 177-182. Port Elizabeth, Port Elizabeth Technikon, (1999)
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, page 127-142. (2002)
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)