Alan V. Oppenheim.  <br/><br/>
Digital signal processing /  
Alan V. Oppenheim and Ronald W. Schafer.  
 - New Delhi :   PHI Learning,   1975.  
 - xiv, 585 p. ;   23 cm.  
<br/><br/><label>ISBN: </label>9788120305328 
<br/><br/><label>Subjects--Index Terms: </label>Discrete time signal.  
<br/><br/><label>Dewey Class. No.: </label>621.38195  / OPP