@book{1187,
	author = {Leithold, Louis and Mata González, Fidencio},
	title = {El cálculo},
	publisher = {Oxford University Press},
	year = {1998},
	address = {México :},
	edition = {7a. ed},
	url = {https://www.biblioeco.unsa.edu.ar/pmb/images/libros/L117666.jpg}
}