PETRO, Marek. Encyclical Letter Humanae Vitae in the Course of Time. Philosophy and Canon Law, [S. l.], n. 5, p. 23–34, 2020. DOI: 10.31261/PaCL.2019.05.02. Disponível em: https://journals.us.edu.pl/index.php/pcl/article/view/10092. Acesso em: 17 apr. 2025.