@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}
}
@booklet {RicKor-KJ2-2002,
	title = {Kalenderblatt {Juni} 2002},
	year = {2002},
	note = {MathInsight 2000, Springer-Verlag, Heidelberg.},
	publisher = {Springer-Verlag},
	keywords = {sonstige},
	author = {Richter-Gebert, J{\"u}rgen and Kortenkamp, Ulrich}
}
@unpublished {KorRic-SJE-1999,
	title = {Shrink-Wrapped Java in Education},
	year = {1999},
	note = {Unpublished Manuscript},
	keywords = {sonstige},
	url = {http://www.cinderella.de/papers/shrink.pdf},
	author = {Kortenkamp, Ulrich H. and Richter-Gebert, J{\"u}rgen}
}
