KOZIEŁ, Grzegorz. Civil Law and Commercial Law in Activities of the Administration. Tradition and Modernity in Legal Institutions. Part 2. Introduction. PRAWO i WIĘŹ, Słupsk, n. 31, 2020. DOI: 10.36128/priw.vi31.81. Disponível em: https://prawoiwiez.edu.pl/index.php/piw/article/view/81. Acesso em: 7 jun. 2025.