1. Department of General and Industrial Microbiology, Faculty of Biology, Sofia University St. “Kliment Ohridski”, 8 Dragan Tsankov Blvd., 1000 Sofia, Bulgaria
2. R&D Department, LB Bulgaricum PLC, 14 Malashevska Str., 1000 Sofia, Bulgaria
3. Institute of Soil Science, Agrotechnologies and Plant Protection “N. Poushkarov”, Agricultural Academy, 1331 Sofia, Bulgaria