1. “Petru Poni” Institute of Macromolecular Chemistry; Aleea Grigore Ghica Voda 41A; 700487; Iasi; Romania
2. Department of Natural and Synthetic Polymers; “Gheorghe Asachi” Technical University of Iasi; Bd. Mangeron 71; Iasi; Romania
3. National Institute for Laser; Plasma and Radiation Physics, Str. Atomistilor 409, 077125 Bucharest-Magurele; Romania