Sowa, Karolina, and Bartłomiej Bajan. “POLAND’S FOOD SECURITY IN 2007–2016”. Journal of Agribusiness and Rural Development 53, no. 3 (October 8, 2019): 243–255. Accessed September 19, 2020. http://www1.up.poznan.pl/jard/index.php/jard/article/view/1214.