Minc, Henryk. <br/><br/>
Encyclopedia of Mathematics and its Applications Vol-6 /  

 - First Ed.. /  
 - London :   Addison-Wesley Publishing Company. 
 - p.205,xii :  
<br/><br/><label>ISBN: </label>0-201-13505-1 
<br/><br/><label>Dewey Class. No.: </label>B245  / L8