Oppenheim, A.V <br/><br/>
Signals & systems/ 
Alan V. Oppenheim 
 - 2nd  
 - Boston:  Prentice Hall  1997. 
 - xv,957p.:  ill.;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0136511759 
<br/><br/><label>LC Class. No.: </label>DUCE QA402.O63