Edwards, C. H. 1937- Elementary differential equations with boundary value problems / C. Henry Edwards, David E. Penney ; with the assistance of David Calvis. - 6th edition. - xi, 760 páginas ; 26 cm. ISBN: 0136006132 Subjects--Topical Terms: Valores de frontera--Problemas.Ecuaciones diferenciales. LC Class. No.: QA371 / .E39 2008