1. Polymer Institute, Slovak Academy of Sciences; Dúbravská cesta 9 SK-845 41 Bratislava Slovak Republic
2. Istituto per lo Studio delle Macromolecole; Consiglio Nazionale delle Ricerche; Via Bassini 15 20133 Milano Italy
3. Institute of Organic Chemistry; Slovak University of Technology; Radlinského 9 81237 Bratislava Slovak Republic