- Austrian Society of Engineers and Architects (ÖIAV)
- National Sports Academy. V. Levski
- Academy of Economics. D. A. Tsenova
- Fraunhofer institute of optotronics, system technologies and image exploitation advanced system technology IOSB-AST (Germany)
- Institute for Environmental Analysis
- Institute of Slavic Studies, Dresden Technical University
- International Center for Education and Scientific Information
- Cardiff School of Mathematics
- Technological Educational Institute of Western Greece
- Center for Mathematical Research Barcelona
- Institute of Higher Geopolitical Studies and Related Sciences
- International Center for Relativistic Astrophysics (ICRANET)
- Institute of Physics and Solid State, University of Latvia
- Educational center "Eurasian Perspective"
- European Institute of Public Relations
- Institute Jean-Pierre Burgin
- International Academy CONCORD
- Laboratoire de Mathematiques, Universite Savoie Mont Blanc
- National Institute of Oriental Languages and Civilizations
- Turkiye Adalet Akademisi
