1. The John Paul II Catholic University of Lublin, Al. Racławickie 14, 20-950 Lublin, Poland
2. Drohobych Ivan Franko State Pedagogical University, I. Franko Str. 24, 82100 Drohobych, Ukraine
3. Institute of Cell Biology, National Academy of Sciences of Ukraine, Drahomanov Str. 14/16, 79005 Lviv, Ukraine
4. Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11 Bratislava, Slovak Republic
5. Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovak Republic
6. Kaunas University of Technology, Radvilenu rd. 19, 50254 Kaunas, Lithuania
7. Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl. 10, 1113 Sofia, Bulgaria