Openheim, Alanv and Willsky Alan S. <br/><br/>
Signal and system  / 

 - 2nd. 
 - New Delhi  Prentice Hall,  c2008. 
 - xxx,957 p. ;  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>97881203112463 
<br/><br/><label>Dewey Class. No.: </label>621.3822320