@book{3808,
	author = {Lipschutz, Seymour and  Lipson, Mare Lars; autor.},
	title = {Matemáticas discretas /},
	publisher = {McGraw-Hill, },
	year = {2009},
	series = {Schaum },
	address = {México :},
	edition = {Tercera edición},
	note = {Incluye índice.}
}