Mann 1906, s. 122. Mann, Horace Kinder (1906). The Lives of the Popes in the Early Middle Ages. Volume 5: The Popes In The Days of Feudal Anarchy, from Formosus to Damasus II, Part 2. London: Kegan Paul, Trench, Trubner & Co.
Mann 1906, s. 124. Mann, Horace Kinder (1906). The Lives of the Popes in the Early Middle Ages. Volume 5: The Popes In The Days of Feudal Anarchy, from Formosus to Damasus II, Part 2. London: Kegan Paul, Trench, Trubner & Co.
