Le vrai pouvoir du Vatican / Jean-Michel Meurice, 2010 [biographie des intervenants,
p. 226]
Wikipedia, 2022-10-12
Information trouvée : Peter Gumpel (15 November 1923 – 12 October 2022) was a German Jesuit priest and Church
historian. A professor emeritus of the Gregorian University in Rome, he was the relator
in Pope Pius XII's cause for beatification.