@book{227937,
	author = {Eldring, Jan. and ebrary, Inc.},
	title = {Porter's (1980) generic strategies, performance and risk},
	publisher = {Diplomica Verlag,},
	year = {2009.},
	address = {Hamburg :},
	note = {Title from cover.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10487362}
}