MANDZIUK, Józef. Father Kasper Druzbicki SJ (1590 – 1662) and his teachings about Christian perfection. Saeculum Christianum. Pismo Historyczne, [S. l.], v. 24, p. 126–137, 2021. DOI: 10.21697/sc.2017.24.11en. Disponível em: https://czasopisma.uksw.edu.pl/index.php/sc/article/view/8509. Acesso em: 5 grudz. 2025.