Sharkovsky, A. N. Difference equations and their applications - Dordrecht, Boston: Kluwer Academic Publishers, c1993. - xii, 358 p. ill. 25 cm - Mathematics and its applications vol. 250 . - Mathematics and its applications (Kluwer Academic Publishers) ; . Bibliografie p. 335;Index p. 357 eng ISBN: 0792321944 LCCN: 93006939 Subjects--Topical Terms: Difference equations LC Class. No.: QA431 Dewey Class. No.: 515.625