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Aneta Becker
West Pomeranian University of Technology Faculty of Economics Department of Applied Mathematics in Economics Janickiego 31, 71-270Szczecin, Poland
Jarosław Becker
The Jacob of Paradies Academy in Gorzów Wielkopolski Faculty of Technology Department of Intelligent Decision Support Systems Fryderyka Chopina 52, 66-400Gorzów Wielkopolski, Poland