@book{12908,
	author = {ZILL, DENNIS G. and CULLEN, MICHAEL R., COAUT.},
	title = {ECUACIONES DIFERENCIALES CON PROBLEMAS CON VALORES EN LA FRONTERA/ },
	publisher = {CENGAGE LEARNING},
	year = {2009},
	address = {AUSTRALIA ; MEXICO: },
	edition = {7}
}