@book{128985,
	author = {Veltkamp, Martijn. and ebrary, Inc.},
	title = {Free form structural design},
	publisher = {IOS Press,},
	year = {c2007.},
	series = {Research in architectural engineering series,},
	address = {Amsterdam :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10216830}
}