Boyce, William E. Elementary differential equations and boundary value problems / William E. Boyce and Richard C. DiPrima. - 7th ed. - New York : Wiley & Sons, Inc. 2001. - xvi, 745 p. : ill. ; 26 cm. Includes index. ISBN: 0471319996 LCCN: 00023752 Subjects--Topical Terms: Differential equations.Boundary value problems. Dewey Class. No.: 515.35 / BOE