Boyce, William E. Elementary differential equations and boundary value problems / William E. Boyce, Richard C. Diprina. - 3a ed. - New York, E. U. : John Wiley & Sons, 1966 - 638 p. : il. ; 22 cm. Incluye índice Subjects--Topical Terms: Ecuaciones Diferenciales LC Class. No.: QA371 / B69 1966