@article {KorRic-CGPD-2008,
	title = {Cinderella.2 {\textendash} Geometrie und Physik im Dialog},
	journal = {Computeralgebra-Rundbrief},
	year = {2008},
	keywords = {lehrer},
	url = {http://kortenkamps.net/papers/2008/Rundbrief-CA-Kortenkamp.pdf},
	author = {Kortenkamp, Ulrich and Richter-Gebert, J{\"u}rgen}
}
@article {RicH.K-CNU-2000,
	title = {Cinderella {\textendash} Nachmittagssoftware im Unterricht?},
	journal = {Rundgang},
	volume = {2},
	year = {2000},
	month = {jun},
	publisher = {Klett und Balmer},
	keywords = {lehrer},
	url = {http://www.cinderella.de/papers/rundgang0200.pdf},
	author = {Richter-Gebert, J{\"u}rgen and H.~Kortenkamp, Ulrich}
}
