@book{128,
	author = {Rosen, Kenneth H.},
	title = {Discrete Mathematics and its Applications},
	publisher = {Mc Graw-Hill,},
	year = {2012},
	address = {New York :},
	edition = {7 ed.},
	url = {https://itmsp.museknowledge.com/UOH?qurl=https://libros-uoh.uoh.cl/ESCUELADEINGENIERIA/Discrete%2520Mathematics%2520and%2520its%2520Applications/}
}