* Ladel, S. & Kortenkamp, U. (2009): Realisations of MERS (Multiple Extern Representations) and MELRS (Multiple Equivalent Linked Representations) in Elementary Mathematics Software. In: Proceedings of CERME 6, Lyon. 2009 | * Ladel, S. & Kortenkamp, U. (2009): Realisations of MERS (Multiple Extern Representations) and MELRS (Multiple Equivalent Linked Representations) in Elementary Mathematics Software. In: Proceedings of CERME 6, Lyon. 2009 |