1. Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic Heyrovský Sq. 2 16206 Prague 6 Czech Republic
2. Charles University Faculty of Mathematics and Physics Ke Karlovu 3 12116 Prague 2 Czech Republic
3. CETMIC–CCT La Plata CICBA Camino Centenario y 506 1897 M. B. Gonnet, La Plata Argentina
4. Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic