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Journal of Entrepreneurship, Management and Innovation > 2016 > 12 > 2 > 123-150
Zarządzanie i Finanse > 2015 > 2 > 121-132
Journal of Entrepreneurship, Management and Innovation > 2016 > 12 > 2 > 123-150
Zarządzanie i Finanse > 2015 > 2 > 121-132