KOCH, kard. K. “Ut unum sint” – an Encyclical that Deepens the Ecumenical Involvement of the Catholic Church. Rocznik Teologiczny, [S. l.], v. 62, n. 3, p. 763, 2023. Disponível em: https://ojs.chat.edu.pl/index.php/rt/article/view/344. Acesso em: 29 grudz. 2024.