Pacelli, Eugenio to Gasparri, Pietro from 15 April 1920, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 12376, URL: www.pacelli-edition.de/en/Document/12376. Last access: 04-04-2025.Online since 25-06-2013, last modification 10-09-2018.