@book{92486,
	author = {G�obel, R. and Trlifaj, Jan. and ebrary, Inc.},
	title = {Approximations and endomorphism algebras of modules},
	publisher = {Walter de Gruyter,},
	year = {2006.},
	series = {De Gruyter expositions in mathematics ;},
	address = {Berlin ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10154725}
}