Oppenheim, Alan V. <br/><br/>
Discrete-time signal processing 
by Alan V. Oppenheim, Ronald W. Schafer. 
 - Englewood Cliffs  Prentice-Hall  1989 
<br/><br/><label>ISBN: </label>013216292X 
<br/><br/><label>Dewey Class. No.: </label>621.38043  / N89;2 (CEDT)