@conference {Kor-IGC-2001, title = {Die interaktive {G}eometrie-{S}oftware {C}inderella}, booktitle = {Tagungsband Learntec 2001}, volume = {2}, year = {2001}, pages = {525{\textendash}532}, address = {Karlsruhe}, keywords = {refereed}, author = {Kortenkamp, Ulrich}, editor = {Beck, Uwe and Sommer, Winfried} }