1. Institute of Chemistry Timisoara of Romanian Academy; M. Viteazul Ave 24 300223 Timisoara Romania
2. Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoy pr. 31 199004 St Petersburg Russia
3. National Institute for Research and Development in Electrochemistry and Condensed Matter; 1 Plautius Andronescu Street 300224 Timisoara Romania
4. ‘Politehnica’ University of Timisoara; Vasile Parvan Ave 6 300223 Timisoara Romania