@book{220769,
	author = {Robinson, Derek John Scott. and ebrary, Inc.},
	title = {An introduction to abstract algebra},
	publisher = {Walter de Gruyter,},
	year = {2003.},
	series = {De Gruyter textbook},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10194881}
}