@book{1225,
	author = {Karr, Alan F.},
	title = {Probability},
	publisher = {Springer-Verlag,},
	year = {1993},
	address = {New York, USA :},
	url = {https://itmsp.museknowledge.com/UOH?qurl=https://libros-uoh.uoh.cl//ebook_3/probability/}
}