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Polish Journal of Management Studies > 2019 > Vol. 19, No. 1 > 204--214
ECONTECHMOD : An International Quarterly Journal on Economics of Technology... > 2013 > Vol. 2, No 4 > 53-60
Polish Journal of Management Studies > 2019 > Vol. 19, No. 1 > 204--214
ECONTECHMOD : An International Quarterly Journal on Economics of Technology... > 2013 > Vol. 2, No 4 > 53-60