Katok ,Anatole Introduction to the modern theory of dynamical systems / by Anatole Katok and Boris Hasselblatt - Delhi : Cambridge University Press , 1996. - xviii,802p. : ill. ; includes bibliographies and index. ISBN: 9780521575577 (pbk) 9780521341875 (hbk) Dewey Class. No.: 515.352 / KAT/I