TYRAWA, D. Administrative Law and International Law. An Attempt at Systematics. Przegląd Prawno-Ekonomiczny, [S. l.], n. 21 (4), p. 80–91, 2012. DOI: 10.31743/ppe.15475. Disponível em: https://czasopisma.kul.pl/index.php/ppe/article/view/15475. Acesso em: 19 maj. 2025.