Volume 6, Issue 1, March 2018
Tsvetelina Veselinova Velikova; Zoya Angelova Spassova; Lyuben Mitkov Milatchkov; Dobriana Georgieva Panova; Ekaterina Ivanova Ivanova - Todorova; Kalina Dinkova Tumangelova - Yuzeir; Ekaterina Krasimirova Kurteva; Dobroslav Stanimirov Kyurkchiev; Siragan Arshavir Deredjan; Rosen Kirilov Nikolov; Iskra Petrova Altankova; Lyudmila Mateva Vladimirova