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Central European Review of Economics & Finance > 2022 > 38 > 3 > 78-98
Organizacja i Zarządzanie : kwartalnik naukowy > 2015 > nr 3 > 115--129
Logistics and Transport > 2012 > 15 > 19-26
Logistics and Transport > 2012 > 14 > 45-52
Logistics and Transport > 2012 > 14 > 61-72