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Kortenkamp, U.  (2013).\'a0\'a0Madipedia ? Das Wiki f\'fcr die Mathematikdidaktik.  (Fleckenstein, S., Ed.).\ul Georg-Cantor-Zeitschrift. 15,\ul0  25-39.\par \par Kortenkamp, U.  (2008).\'a0\'a0Math Unit Testing ? A New Approach to the Use of Technology in Teaching.  (Laborde, C., Ed.).\ul \ul0  \par \par Kortenkamp, U.  (2002).\'a0\'a0Making the move: The next version of Cinderella.  (Cohen, A. M., Gao X-S., & Takayama N., Ed.).\ul Proceedings of the First International Congress of Mathematical Software. \ul0  208?216.\par \par }