- Science & Education Foundation, Bulgaria
- University of National and World Economy, Bulgaria
- Agricultural University - Plovdiv, Bulgaria
- Institute of Physical Chemistry, Bulgarian Academy of Sciences
- Sapporo University, Japan
- University of Life Sciences in Lublin, Poland
- WSEI University, Poland
- Vincent Pol University, Poland
- VUZF University, Bulgaria
- Institute of Management, University of St. Cyril and Methodius in Trnava, Slovakia
- Duzce University, Turkey
- Gheorghe Asachi Technical University, Romania
- Achva Academic College, Israel
- Faculty of Technology, University in Nis, Serbia
- Al–Farabi Kazakh National University, Kazakhstan
- Electronic Materials Laboratory, Institute of Physics in Belgrade, Serbia
- Institute of Hydrometeorology, Georgian Technical University, Georgia
- Department of Meteorology and Climatology, Tajik National University, Tajikistan