Liliya G. Zisova; Anastasia A. Chokoeva; Georgi I. Amaliev;
Penka V. Petleshkova;
Tsonka M. Miteva-Katrandzieva;
Maya B. Krasteva;
Ekaterina H. Uchikova;
Andrei H. Kouzmanov;
Zoya V. Ivanova и др.
Ivan S. Ivanov; Nikolay I. Popov; Rumyana I. Moshe;
Elena V. Chepisheva;
Ina E. Geneva;
Margarita V. Panova;
Alexander A. Karparov;
Tonyo Il. Shmilev;
Rumen S. Stefanov;
Miroslava N. Bosheva и др.