Vefie Poels, De rode paus. Biografie van Willem van Rossum CSSR (1854-1932) . BMGN - Low Countries Historical Review, [S. l.], v. 138, 2023. DOI: 10.51769/bmgn-lchr.13632. Disponível em: https://ojstest.minions.amsterdam/article/view/13632.. Acesso em: 2 jul. 2024.