KRAJEWSKI, Marcin. The legal model of self-employment in Poland – the perspective of social insurance. W: DURAJ, Tomasz (red.). In Search of a Legal Model of Self-Employment in Poland: A Comparative Legal Analysis. Part II. PrawoPoland: Wydawnictwo Uniwersytetu Łódzkiego,2024. p. 169–190. DOI: 10.18778/8331-526-3.04. Disponível em: https://www.press.uni.lodz.pl/index.php/wul/catalog/book/1019/chapter/2858. Acesso em: 21 sty. 2026.