@book{16324,
	author = {Zill, Dennis G. and Cullen, Michael R.},
	title = {Ecuaciones diferenciales :},
	publisher = {Cengage Learning,},
	year = {2009.},
	address = {México, D.F. :},
	edition = {7a ed.},
	note = {Contiene respuestas a los problemas.}
}