Acta Nuntiaturae Polonae. Tomus LVII. Achilles Ratti (1918-1921). Volumen 3 (12 XI1918-31 I 1919). Zeitschrift für Ostmitteleuropa-Forschung, Marburg, v. 47, n. 2, p. 313, 1998. DOI: 10.25627/19984726644. Disponível em: https://openjournals.osmikon.de/zfo/article/view/6644. Acesso em: 31 oct. 2026.