Weisstein, Eric W., <br/><br/>
CRC Concise Encyclopedia of Mathematics 

 - Boca Raton :  Chapman & Hall/CRC,  c1999. 
 - 1969 p.:  [10-C] 
<br/><br/><label>ISBN: </label>0849396409 
<br/><br/><label>Dewey Class. No.: </label>510.3  / WEI/CRC