@book{264,
	author = {Schonberger, Richard. and Knod, Edward M.},
	title = {Operations management :},
	publisher = {Irwin,},
	year = {�1991.},
	address = {Homewood, IL :},
	edition = {4th ed., International student ed.},
	url = {http://www.gbv.de/dms/hbz/toc/ht003948133.PDF}
}