Oppenheim, Alan V., <br/><br/>
Discrete-time signal processing / 
Alan V. Oppenheim, Ronald W. Schafer. 
 - New Delhi:  Prentice Hall,  Pearson,  c1989, 1999. 
 - xv, 879 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>013216292X 
<br/><br/><label>Subjects--Index Terms: </label>Signal processing--Mathematics  Discrete-time systems. 
<br/><br/><label>Dewey Class. No.: </label>621.38/043  / OPP