@book{13406,
	author = {Massey, William S. and Bochner, Salomon.},
	title = {Algebraic Topology: an introduction},
	publisher = {Harcourt, Brace & World, Inc.,},
	year = {1968.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/B005USSIL0/chopaconline-20}
}