DE GAÁL, Emery. Laudato Si and Pope Francis’ “Hero”, Romano Guardini. Rocznik Teologii Katolickiej, [S. l.], v. 18, p. 5–13, 2019. DOI: 10.15290/rtk.2019.18.01. Disponível em: https://rtk.uwb.edu.pl/index.php/rtk/article/view/115. Acesso em: 4 dec. 2025.