Marks-Bielewska, Renata, Wiesława Lizińska, and Izabbela Sierocka. 2015. “Polish Agri-Food Foreign Trade and Its Comparative Advantage in 2008-2013”. Journal of Agribusiness and Rural Development 38 (4), 757-67. https://doi.org/10.17306/JARD.2015.80.