@book{97353,
	author = {Szczepa�nski, Andrzej. and ebrary, Inc.},
	title = {Geometry of crystallographic groups},
	publisher = {World Scientific,},
	year = {2012.},
	series = {Algebra and discrete mathematics ;},
	address = {Hackensack, NJ :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10607776}
}