Pacelli, Eugenio to Pizzardo, Giuseppe from 10 June 1923, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 14333, URL: www.pacelli-edition.de/en/Document/14333. Last access: 03-04-2025.Online since 23-07-2014.