Boyvalenkov,  Peter <br/><br/>
Bulgarian Mathematical Competitions 2003-2006 / 
by Peter Boyvalenkov...[et al.] 
 - Kolkata :  Levant Books,  2014. 
 - viii, 212 p. :  24 cm. 
<br/><br/><label>ISBN: </label>978-9380663937 (pbk.) 9380663935 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>510  / BOY/B