Hsieh, Po-Fang Basic theory of ordinary differential equations / by Po-Fang Hsieh and Yasutaka Sibuya - New York : Springer, 1999. - xi, 468 p. : ill. ; 25 cm. - Universitext . Includes bibliographical references and index. ISBN: 9780387986999 Subjects--Topical Terms: Differential equations. Dewey Class. No.: 515.35 / HSI/B