Differential equations : theory, technique, and practice / George F. Simmons and Steven G. Krantz. Simmons, George F. Krantz, Steven G. jt. aut. Differential equations Textbooks. 515.35 SID Includes index. Bibliography: p. 495-496. Chennai : McGraw Hill Education , 2007 (2017). 2007 (2017). 2007 Text x, 534 p. : eng The Walter Rudin student series in advenced mathematics .