Wielechowski, M., and M. Roman. “THE ESSENCE OF FAIR TRADE AND ITS IMPORTANCE IN THE WORLD ECONOMY”. Acta Scientiarum Polonorum. Oeconomia, Vol. 11, no. 4, Dec. 2012, pp. 47-57, https://js.wne.sggw.pl/index.php/aspe/article/view/4066.