1. The Czech Academy of Sciences; Nuclear Physics Institute; Hlavní 130 250 68 Husinec-Řež Czech Republic
2. The Czech Academy of Sciences; Institute of Rock Structure and Mechanics; V Holešovičkách 41 182 09 Prague 8 Czech Republic
3. Faculty of Food and Biochemical Technology, Department of Biotechnology; University of Chemistry and Technology; Prague, Technická 5 166 28 Prague 6-Dejvice Czech Republic