1. National Institute for Laser, Plasma and Radiation Physics; 409 Atomistilor Street 77125 Magurele, Bucharest Romania
2. National Institute of Materials Physics; 105 Bis Atomistilor Str. 077125 Magurele, Bucharest Romania
3. Polymer Department; National Institute of Research and Development in Chemistry and Petrochemistry; 202 Splaiul Independentei street 060021 Bucharest Romania