1. Medical University-Varna,
2. University of Quebec in Outaouais, Photonics Research Center
3. Medical University—Pleven
4. Geological Institute, Bulgarian Academy of Sciences
5. Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences
6. Cégep de l'Outaouais, Campus Louis-Reboul
7. M'Hamed Bougara University of Boumerdès