@book{39365,
	author = {Hadlock, Charles Robert. and ebrary, Inc.},
	title = {Six sources of collapse},
	publisher = {Mathematical Association of America,},
	year = {c2012.},
	series = {Spectrum series},
	address = {[Washington, D.C.] :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10722447}
}