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Przegląd Europejski > 2023 > 1(67) > 29-48
Folia Oeconomica Stetinensia > 2012 > 11 > 1 > 178-131
Journal of Achievements in Materials and Manufacturing Engineering > 2012 > Vol. 55, nr 2 > 498--503
Ekonomický časopis (Journal of Economics) > 2008 > 56 > 1 > 39-52