Fritzlar, T., 
2006, 
Proceedings of the 30th Conference of the  International Group for the Psychology of Mathematics Education. Novotna, J., Maraova, H., Kratka, M. & Stehlikova, N. (Hrsg.). Prage: 
Charles University, Prague, 
Band 1. 
S. 253 1 S. (Proceedings of the Conference of the International Group for the Psychology of Mathematics Education).
Publikation: Beiträge in Sammelwerken › Abstracts in Konferenzbänden › Forschung