[1] Univ Zagreb, Dept Geog, Fac Sci, Marulicev Trg 19-2, Zagreb 10000, Croatia
[2] Univ Zagreb, Dept Biol, Fac Sci, Rooseveltov Trg 6, Zagreb 10000, Croatia
[3] RuCer Boskovic Inst, Radiocarbon Lab, Bijenicka 54, Zagreb 10000, Croatia
[4] Univ Zagreb, Dept Phys, Fac Sci, Bijenicka 32, Zagreb 10000, Croatia
[5] Univ Fed Fluminense, Dept Fis, Av Gal Milton Tavares Souza S-N, BR-24210346 Niteroi, RJ, Brazil