Coddington, Earl A. 1920- Theory of ordinary differential equations /Earl A. Coddington, Norman Levinson - New York : McGraw-Hill, 1955. - xiii, 429 p. il. 24 cm. - International series in pure and applied mathematics . Incluye índice Bibliografía: p. 417-422 Subjects--Topical Terms: ECUACIONES DIFERENCIALES