PRZEBINDA, Grzegorz. The Rus and their Saints in the Slavic Teaching of John Paul II. Between History and the Present Day. Przegląd Rusycystyczny, [S. l.], n. 2, 2016. Disponível em: https://journals.us.edu.pl/index.php/PR/article/view/4770. Acesso em: 5 grudz. 2025.