Europe : Bulgaria
- University of BordeauxEurope : France (South-West)
- Europe : Germany
- America : Canada
- University of Duisburg-EssenEurope : Germany
- Higher School of Economics (HSE)Europe : Russia
- Europe : Netherlands
- University of GöttingenEurope : Germany
- Asia : India
- Europe : Austria
- Centro para el Desarrollo Tecnológico IndustrialEurope : Spain