[1] Czech Acad Sci, Nucl Phys Inst, Hlavni 130, Husinec Rez 25068, Czech Republic
[2] Charles Univ Prague, Dept Archaeol, Celetna 20, Prague 11642, Czech Republic
[3] Czech Acad Sci, Inst Archaeol, Letenska 123-4, Prague 11800, Czech Republic
[4] Charles Univ Prague, Inst Environm Studies, Fac Sci, Benatska 2, Prague 12800, Czech Republic
[5] Czech Acad Sci, Inst Geol, Rozvojova 269, Prague 16500, Czech Republic