CEGLARSKA-JÓŹWIAK, Joanna. Contractor’s specific problems of social insurance in the context of the lack of the contractor’s obligation to personally provide work. Acta Universitatis Lodziensis. Folia Iuridica, Poland, v. 88, p. 157–166, 2019. DOI: 10.18778/0208-6069.88.14. Disponível em: https://www.czasopisma.uni.lodz.pl/Iuridica/article/view/5804. Acesso em: 25 may. 2026.