1. Indunor; Buenos Aires Argentina
2. SILVA Chimica; S.Michele Mondovi Italy
3. LERMAB; University of Lorraine; Epinal France
4. Department of Physics; King Abdulaziz University; Jeddah Saudi Arabia
5. Polymer Research Institute, University of Stellenbosch; Stellenbosch South Africa
6. IS2M; Institut de Science des Matériaux de Mulhouse; CNRS LRC 7228 Mulhouse France
7. IJL; University of Lorraine; Epinal France