SZLACHTA-KISIEL, Katarzyna. Concepts of the material legal relationship of social insurance and the status of its entities as parties to the pre-trial proceedings in pension and disability matters. Annales Pomorienses. Ius, Slupsk, n. 4, p. 132–145, 2025. DOI: 10.34858/api.4.2025.86. Disponível em: https://api.upsl.edu.pl/index.php/ius/article/view/86. Acesso em: 4 jun. 2026.