Oppenheim, Alan V., Discrete-time signal processing - 2nd ed. - New Delhi Pearson Printice Hall 1999 - xxvi, 888p.: ill.; 25 cm. - Prentice-Hall signal processing series. . Includes bibliographical references (p. 851-858) and index. ISBN: 9788131704929 Dewey Class. No.: 621.3822 OPP (9)