@book{44369,
	author = {Spivak, Michael and Oller Sala, José Maria,},
	title = {Calculus.},
	publisher = {Editorial Reverté,},
	year = {2012,2014,2015.},
	address = {Barcelona :},
	edition = {3a. edición (4a. edición original).},
	note = {Incluye Indice y Glosario.}
}