Oppenheim, Alan V.  <br/><br/>
Signals and systems / 
Alan V. Oppenheim and Alan S. Willsky. 
 - 2nd ed. 
 - New Delhi :  PHI learning,  c1997 [Reprinted 2013]. 
 - xxx, 957 pages :  illustrations ;  25 cm. 
<br/><br/>Includes bibliographical references (p. 519-520) and index. 
<br/><br/><label>ISBN: </label>9788120312463 8120312465 
<br/><br/><label>Subjects--Topical Terms: </label><br/>System analysis<br/>Discrete-time systems.<br/>Digital filters (Mathematics).
<br/><br/><label>Dewey Class. No.: </label>621.3822 OPP