@book{235520,
	author = {Grygiel, Jakub J., and ebrary, Inc.},
	title = {Great powers and geopolitical change},
	publisher = {Johns Hopkins University Press,},
	year = {2006.},
	address = {Baltimore :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10188449}
}