1. Department of Chemical Engineering, University of Chemistry and Technology, Technická 3, 166 28 Prague 6 − Dejvice, Czech Republic
2. Zentiva, k.s., U Kabelovny 130, 10237 Prague 10, Czech Republic
3. Department of Structure Analysis, Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 112/10, 162 00 Praha 6, Czech Republic
4. Department of Dielectrics, Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 182 21 Praha 8, Czech Republic