Book Series of the


Mathematics and Its Applications, Multibody System
Mechanics: by V. KONOPLEV and A. CHEREMENSKY 
Mathematical Library, BULGARIAN
MATHEMATICAL COMPETITIONS, by
S. Grozdev, E. Kolev, 
Mathematics and Its Applications, Geometrical Methods for by P. POPIVANOV 
Informatics Library, Book 1 24th BULGARIAN NATIONAL OLYMPIAD IN INFORMATICS edited by Stoyan Kapralov, Krassimir Manev and Emil Kelevedjiev 
Mathematics and Its Applications, by I. DERZHANSKI 
