@book{89300,
	author = {Boyce, William E. and DiPrima, Richard C.},
	title = {Elementary differential equations and boundary value problems},
	publisher = {Wiley},
	year = {2017},
	address = {Hoboken (Nueva Jersey, Estados Unidos)},
	edition = {12a. Ed},
	url = {http://www.loc.gov/catdir/toc/wiley041/2003070545.html}
}