RATAJCZAK, Krzysztof. The Pilgrimages of the Piast Dynasty in the Middle Ages. Biuletyn Polskiej Misji Historycznej, [S. l.], n. 10, p. 227–250, 2015. DOI: 10.12775/BPMH.2015.008. Disponível em: https://apcz.umk.pl/BPMH/article/view/BPMH.2015.008. Acesso em: 3 lip. 2025.