1. Nuclear Physics Institute CAS, v. v. i. The Czech Academy of Sciences Na Truhlářce 39/64 Prague 8 180 86 Czech Republic
2. Institute of Rock Structure and Mechanics, v. v. i. The Czech Academy of Sciences V Holešovičkách 41 182 09 Prague 8 Czech Republic
3. University of Chemistry and Technology Prague Technická 5 166 28 Prague 6 Czech Republic