@book{68836,
	author = {Ibáñez Torres, Raúl,},
	title = {Los secretos de la multiplicación :},
	publisher = {Los libros de la Catarata,},
	year = {2015.},
	series = {Miradas matemáticas},
	address = {Madrid :},
	url = {https://elibro.net/ereader/politecnicointernacional/235183}
}