Sedaghat, Hassan <br/><br/>
Form Symmetries And Reduction of Order In Difference Equations 
/ by Hassan Sedaghat 
 - USA	:  Crc Press Taylor & Francis Group,  2011. 
 - xi,313p. 
<br/><br/><label>ISBN: </label>9781439807606 
<br/><br/><label>Dewey Class. No.: </label>515.625  / SED/F