| Maria Czeller | University of Debrecen, Hungarian Scholar 2019-2020 |
| Eniko Bus | ELI - ALPS Research Institute-Szeged, Hungarian Scholar 2018-2019 |
Philippe W. Zgheib | School of Business, American University of Beirut, Lebanon. Fall, 2004 |
Hana Salman | Department of Environmental Engineering, Tishreen University, Syria |
Iryna Lendel | Department of Economics, Ivano-Frankivsk National University of Oil and Gas, Ukraine |