SZYPNIEWSKI, Michał. Self-Employment in the Light of Pursuit of Activities in Other Member States. Acta Universitatis Lodziensis. Folia Iuridica, Poland, v. 101, p. 215–222, 2022. DOI: 10.18778/0208-6069.101.16. Disponível em: https://www.czasopisma.uni.lodz.pl/Iuridica/article/view/15839. Acesso em: 9 aug. 2026.