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Kwartalnik Naukowy Uczelni Vistula > 2018 > 3(57) > 68-78
Gospodarka Narodowa > 2014 > 6 > 123-145
Journal of Agribusiness and Rural Development > 2015 > 4(38) > 675–684
Gospodarka Narodowa. The Polish Journal of Economics > 2014 > 274 > 6 > 123-145