Zhang, Yao <br/><br/>
Combinatorial problems in mathematical competitions / 
Yao Zhang. 
 - Singapore :  World Scientific,  c2011. 
 - 289 p.  ;  23 cm. 
 - 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>LC Class. No.: </label>QA43   / .Z42 2011