BAK, J.; SZAŁKOWSKA, M. The Social Security of Farmers in Poland and in Selected EU Member States. Olsztyn Economic Journal, [S. l.], v. 15, n. 3, p. 239–249, 2020. DOI: 10.31648/oej.6343. Disponível em: https://czasopisma.uwm.edu.pl/index.php/oej/article/view/6343. Acesso em: 22 may. 2022.