GODLEWSKI, Karol Kajetan. The biblical basis and historical development of the Catholic teaching on indulgences. Studia Teologiczne Białystok Drohiczyn Łomża, [S. l.], v. 39, p. 77–96, 2021. DOI: 10.56898/st.9515. Disponível em: https://czasopisma.uksw.edu.pl/index.php/st/article/view/9515. Acesso em: 5 dec. 2025.