Author(s):
1. Ivan Petronijević, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
2. Dragana Cerović, University of Belgrade, Faculty of Physics, Serbia
3. Slavica Maletić, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
4. Marija Šuljagić, University of Belgrade, Faculty of Technology and Metallurgy, , Serbia
5. Filip Marinković, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
6. Dušan Popović, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
7. Duško Dudić, Department of Chemistry, University of the Free State, Private Bag X13, Phuthaditjhaba, 9866 South A, Serbia