Oppenheim, Alan V. <br/><br/>
Signals and systems/ 2nd ed. 

 - 2nd ed. 
 - India  Pearson Education  2008 
<br/><br/><label>Subjects--Index Terms: </label>621.391 
<br/><br/><label>Dewey Class. No.: </label>621.391  / OPP