@book { kerres_multimedi,
	title = {Multimediale und telemediale Lernumgebungen. Konzeption und Entwicklung},
	year = {2001},
	publisher = {Oldenbourg},
	organization = {Oldenbourg},
	edition = {2},
	address = {M{\"u}nchen},
	isbn = {3486250558, 978348625055},
	url = {http://books.google.com/books?id=PwAiNRvIRFsC\&printsec=frontcover\&dq=kerres\&ei=yMkPSv3ICo_CzATl8sGMCw\&hl=de},
	author = {Michael Kerres}
}
