@book{200159,
	author = {Weilkiens, Tim. and Oestereich, Bernd. and ebrary, Inc.},
	title = {UML 2 certification guide},
	publisher = {Elsevier,},
	year = {2006.},
	address = {Amsterdam ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10155836}
}