@book{223249,
	author = {Skyttner, Lars. and ebrary, Inc.},
	title = {General systems theory},
	publisher = {World Scientific,},
	year = {c2005.},
	address = {Singapore ;},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10201182}
}