@book{111,
	author = {Lipschutz, Seymour and Lipson, Marc Lars},
	title = {Matemáticas discretas},
	publisher = {Mc Graw-Hill,},
	year = {2009},
	address = {México :},
	edition = {3 ed.},
	url = {https://itmsp.museknowledge.com/UOH?qurl=https://libros-uoh.uoh.cl/ESCUELADEINGENIERIA/MatematicasDiscretas/}
}