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Business and Economic Horizons > 2018 > Volume 14 > Issue 1 > 17-28
Progress in Economic Sciences > 2017 > 4 > 405-414
Littera Scripta > 2017 > 1 > 166-179
Ekonomia Międzynarodowa > 2016 > 15 > 234-244
Business and Economic Horizons > 2018 > Volume 14 > Issue 1 > 17-28
Progress in Economic Sciences > 2017 > 4 > 405-414
Littera Scripta > 2017 > 1 > 166-179
Ekonomia Międzynarodowa > 2016 > 15 > 234-244