[1] Univ Kragujevac, Dept Chem, Fac Sci, Kragujevac 34000, Serbia
[2] Univ Belgrade, VINCA Inst Nucl Sci, Lab Theoret Phys & Condensed Matter Phys, Belgrade 11001, Serbia
[3] Univ Oviedo, Phys & Analyt Chem Dept, E-33006 Oviedo, Spain
[4] Univ Kragujevac, Dept Biol & Ecol, Fac Sci, Kragujevac 34000, Serbia