Matyjas-Łysakowska, Paulina. “Current Problems in the Field of Sickness Insurance for People Running a Non-Agricultural Business”. Acta Universitatis Lodziensis. Folia Iuridica 101 (December 29, 2022): 235–246. Accessed February 11, 2026. https://www.czasopisma.uni.lodz.pl/Iuridica/article/view/15841.