Pacelli, Eugenio to Gasparri, Pietro from 24 December 1920, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 15743, URL: www.pacelli-edition.de/en/Document/15743. Last access: 03-04-2025.Online since 30-04-2013, last modification 10-09-2018.