Silverman, Joseph H <br/><br/>
A Friendly Introduction to Number Theory / 
by Joseph H. Silverman 
 - 3rd Ed. 
 - New Delhi:  Dorling Kindersely ,  2009 
 - p.434 
<br/><br/><label>ISBN: </label>9788131728512 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Algebra, Number Theory
<br/><br/><label>Dewey Class. No.: </label>512.7  / SIL-F