@book{1242,
	author = {Kortmann, Walter},
	title = {Mikroökonomik :},
	publisher = {Physica-Verl.},
	year = {1999, 1999},
	series = {Physica-Lehrbuch},
	address = {Heidelberg},
	edition = {2., überarb. und erw. Aufl.}
}