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Studia Regionalne i Lokalne > 2018 > 3(73) > 5-26
Economic and Environmental Studies > 2014 > 14 > 4(32) > 461-472
Perspectives of Innovations, Economics and Business > 2014 > 14 > 4 > 184-193
Optimum. Studia Ekonomiczne > 2009 > 2(42) > 163-172