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Zofia Lendzion-Bieluń
West Pomeranian University of Technology, Szczecin, Institute of Inorganic Chemical Technology and Environmental Engineering, 70-322 Szczecin, Pułaskiego 10, Poland
Roman Jędrzejewski
West Pomeranian University of Technology, Szczecin, Institute of Materials Science and Engineering, 70-322 Szczecin, Pułaskiego 10, Poland