Pacelli, Eugenio to Gasparri, Pietro from 18 January 1923, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 12840, URL: www.pacelli-edition.de/en/Document/12840. Last access: 03-04-2025.Online since 23-07-2014.