Oppenheim, Alan V. and Willsky, Alan S. <br/><br/>
Signal and systems / 

 - 2 nd. 
 - New Delhi,  Prentice Hall,  c2009. 
 - xxx,957  p. ;  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>9788120312463 
<br/><br/><label>LC Class. No.: </label>0 
<br/><br/><label>Dewey Class. No.: </label>621.3822320