TY  - BOOK
AU  - Boyvalenkov,Petet B and Mushkarov, O Nikolov, N
TI  - Bulgarian Mathematical Competitions 2003-2006
SN  - 9789380663937
PY  - 2014///
CY  - Kokata
PB  - Levant Books
KW  -  
KW  - Mathematics
ER  -