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Andrzej Wojtalak
Institute of Physics, Centre for Science and Education,
Silesian University of Technology, Division of Geochronology and Environmental IsotopesGliwice, Poland
Robert J. Sokołowski
Department of Geophysics, Faculty of Oceanography and Geography,
University of GdanskPoland
Piotr Moska
Institute of Physics, Centre for Science and Education,
Silesian University of Technology, Division of Geochronology and Environmental IsotopesGliwice, Poland