The Method of New Positivism as Elaborated by Ludwik Ehrlich. Polish Yearbook of International Law, [S. l.], v. 38, p. 99–113, 2018. DOI: 10.24425/pyil.2019.129608. Disponível em: https://czasopisma.inp.pan.pl/index.php/pyil/article/view/2465. Acesso em: 7 dec. 2025.