Biggs, Norman L <br/><br/>
Discrete Mathematics / 
by Norman L. Biggs 
 - New Delhi:  Oxford University  Press,  2004 
 - p.425 
<br/><br/><label>ISBN: </label>0195667522 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>General Principles<br/>Finite Mathematics
<br/><br/><label>Dewey Class. No.: </label>511.1  / BIG-D2