@book{10533,
	author = {Lauritzen, Niels.},
	title = {Concrete abstract algebra :},
	publisher = {Cambridge University Press,},
	year = {2003.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/0521534100/chopaconline-20}
}