1. Department of Chemistry, South-West University “Neofit Rilski”, 2700 Blagoevgrad, Bulgaria
2. Department of Physical Chemistry, Plovdiv University “Paisii Hilendarski”, 4000 Plovdiv, Bulgaria
3. Laboratory of Inorganic Materials (LIM), Chemical Process & Energy Resources Institute, Center for Research and Technology-Hellas (CPERI/CERTH), Thermi, 57001 Thessaloniki, Greece
4. Department of Biochemistry and Microbiology, Plovdiv University “Paisii Hilendarski”, 4000 Plovdiv, Bulgaria