Bak, Joanna, and Małgorzata Szałkowska. “The Social Security of Farmers in Poland and in Selected EU Member States”. Olsztyn Economic Journal 15, no. 3 (November 30, 2020): 239–249. Accessed March 28, 2024. https://czasopisma.uwm.edu.pl/index.php/oej/article/view/6343.