1. Inorganic Chemical
Technology
Department, University “Prof. Dr. Asen Zlatarov”-Burgas, Prof. Yakimov str. 1, Burgas 8010, Bulgaria
2. Inorganic and Analytic Chemistry
Department, University “Prof. Dr. Asen Zlatarov”-Burgas, Prof. Yakimov str. 1, Burgas 8010, Bulgaria