@book {RicKor-CIG-2000,
	title = {Cinderella {\textendash} die interaktive {G}eometriesoftware},
	series = {Clever lernen {\textendash} super Noten!},
	year = {2000},
	publisher = {HEUREKA-Klett Softwareverlag},
	organization = {HEUREKA-Klett Softwareverlag},
	address = {Stuttgart},
	keywords = {software},
	url = {http://cinderella.de},
	author = {Richter-Gebert, J{\"u}rgen and Kortenkamp, Ulrich H.}
}
