- University of Maribor, Faculty of Tourism, Slovenia
- Beykent University , Istanbul, Turkey
- Mendel University in Brno , Checz Republic
- University of Turkish Aeronautical Association , Ankara, Turkey
- IULM International University of Languages and Media , Milano, Italy
- Turiba University , Riga, Latvia
- Malopolska School of Economics iz Tarnowa, Poland
- Universitad de Almeria, Spain
- Universidad de Huelva, Spain
- University of Malaga, Spain
- University of Nicosia, Cyprus
- Alexander Technological Educational Institute of Thessaloniki (ATEITH) , Greece
- Visoka šola za poslovne vede, Slovenia
- The International University College, Bulgaria
- Universitat de Girona, Spain
- University of Economics and Innovation in Lublin, Poland
- University of Social Sciences Lodz, Poland
- Manisa Celal Bayar University , Turkey
- International Antalya University, Turkey
- OTH Regensburg , Deutchland