Pacelli, Eugenio to Gasparri, Pietro from 19 May 1923, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 12991, URL: www.pacelli-edition.de/en/Document/12991. Last access: 04-04-2025.Online since 24-10-2013, last modification 13-06-2014.