Mariya Veleva and Krasimira Yancheva
Pages: 1-9
Snezhina Ivanova
Pages: 17-32
Iliyana Krasteva
Pages: 41-51
Yana Vasileva
Pages: 10-16
Stanislav Stanev
Pages: 33-40
NATURAL AND TECHNICAL SCIENCES SECTION
Adriana Foanene, Penka Zlateva and Adina Milena Tătar
Pages: 52-61
Penyo Lebamovski and Emiliyan Petkov
Pages: 76-86
Mariya Armyanova
Pages: 62-75
Bipin J. Agrawal
Pages: 87-96