- Bulgarian Academy of Sciences
- Union of Scientists in Bulgaria
- Faculty of Organization and Informatics,
University of Zagreb, Varazdin, Croatia - Faculty of Economy and Business Administration,
University of Craiova, Romania - Department of Economics and Administrative Sciences,
Fatih University, Istanbul, Turkey - Faculty of Economics and Management,
University of Defence, Czech Republic - Department of Forestry and Natural Environment,
Department of Business Administration,
School of Business and Economics,
Technological Educational Institute of Kavala, Drama, Greece - Department of Business Administration,
School of Business and Economics, Szent Istvan University,
Institute of Finance and Accountancy,
Hungary - Pedagogical Institute of the Southern Federal University,
Rostov–on–Don, Russia - Faculty of Administration and Business,
University of Bucharest, Romania - Pyatigorsk State Linguistic University, Russia
- Institute of Field and Vegetable Crops, Serbia
- Krasnoyarsk State Agrarian University, Russia