Zhang, Yao. <br/><br/>
Combinatorial problems in mathematical competitions / 
Yao Zhang. 
 - Singapore :  World Scientific,  c2011. 
 - 289 p. ; 
 - Mathematical Oympiad series ;  4. .
<br/><br/><label>ISBN: </label>9789812839497 (pbk.) 9812839496 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis--Problems, exercises, etc.
<br/><br/><label>Universal Decimal Class. No.: </label>519.1  / ZHA