Ziemer, Rodger E. <br/><br/>
Signals and systems: continuous and discrete  continuous and discrete 
Rodger E. Ziemer, William H. Tranter, D. Ronald Fannin. 
 - 4th ed. 
 - Upper Saddle River, NJ :  Prentice Hall,  1998. 
 - 622 p. :  ill. 
<br/><br/><label>ISBN: </label>013496456X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>System analysis.<br/>Discrete-time systems.<br/>Digital filters (Mathematics)