Coutinho, S C. <br/><br/>
Mathematics of ciphers  Number theory and RSA cryptography 
by S C Coutinho 
 - Massachusetts  A K Peters  1999 
 - xv, 196p. 
<br/><br/><label>ISBN: </label>1568810822 
<br/><br/><label>Dewey Class. No.: </label>512.7  / N991