Boyce, William E. Differential equations : an introduction to modern methods and applications / James R. Brannan, William E. Boyce. - Hoboken, NJ : John Wiley, c2007. - xxi, 682 p. : ill. ; 26 cm. ISBN: 9780471651413 Subjects--Topical Terms: Differential equations. Dewey Class. No.: 515.35 BRA