@book{4423,
	author = {EDWARDS, C. HENRY. and PENNEY, DAVID E.},
	title = {ECUACIONES DIFERENCIALES ELEMENTALES Y PROBLEMAS CON CONDICIONES EN LA FRONTERA/ },
	publisher = {PRENTICE-HALL},
	year = {1994},
	address = {MEXICO: },
	edition = {2},
	note = {INCLUYE INDICE.}
}