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Studia Ekonomiczne > 2016 > 255 > 261-269
Security Dimensions: International & National Studies > 2014 > 11(11) > 216-219
Issues of Business and Law > 2010 > 2 > 74-84
Issues of Business and Law > 2010 > 2 > 74-84
Communication Today > 2010 > 1 > 1 > 133-142