@booklet {RicKor-COGP-2008,
	title = {Cinderella {\textendash} {O}nline-{E}xperimente der {G}eometrie und {P}hysik},
	year = {2008},
	keywords = {sonstige},
	url = {http://www.imaginary2008.de},
	author = {Richter-Gebert, J{\"u}rgen and Kortenkamp, Ulrich},
	editor = {Greuel, Gert-Martin}
}
