@book{262111,
	author = {Apostol, Tom M., and Vélez Cantarell, D. Francisco,},
	title = {Calculus.},
	publisher = {Editorial Reverté,},
	year = {[1984]},
	address = {Barcelona :},
	edition = {4a edición.},
	url = {https://www.digitaliapublishing.com/a/67939/}
}