Ulrich Kortenkamp

Ladel, S., & Kortenkamp, U.. (2009). Realisation of MERs (Multiple Extern Representations) and MERLs (Multiple Equivalent Linked Representations) in Elementary Mathematics Software. In V. Durand-Guerrier, Soury-Lavergne, S., & Arzarello, F. (Hrsg.), Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France). gehalten auf der Januar, Februar, Lyon, France: Congress of the European Society for Research in Mathematics Education (CERME).