Oppenheim, Alan V. <br/><br/>
Discrete-time signal processing 
Alan V. Oppenheim, Ronald W. Schafer, John R. Buck 
 - 2nd ed. 
 - New Delhi  Pearson  2009 
 - 888p. 
<br/><br/><label>ISBN: </label>9788131704929 
<br/><br/><label>Subjects--Index Terms: </label>Signals and systems  Fourier transform 
<br/><br/><label>Universal Decimal Class. No.: </label>621.391  / OPP