@book{4501,
	author = {Bochenski, I.M. and Bravo Lozano, Millán},
	title = {Historia de la lógica formal},
	publisher = {Gredos},
	year = {1966},
	address = {Madrid :},
	url = {https://www.biblioeco.unsa.edu.ar/pmb/images/libros/L21889.jpg}
}