Found in articles
Teenpous Dioscurus
107f, 123 Richards, Popes and the papacy, p. 122 Richards, Popes and the papacy, p. 123 Richards, Popes and the papacy, p. 124 Raymond Davis (translator)
oor die keiser uitgespreek. Barraclough, Geoffrey (1964). The Medieval Papacy. Thames and Hudson. ISBN 0-500-33011-5. Duff, Eamon (2001). Saints and Sinners:
Maxwell-Stuart, P. G. Chronicle of the Popes: The Reign-by-Reign Record of the Papacy from St. Peter to the Present, Thames & Hudson, 2002, p. 47. ISBN 0500017980
P. G. (2002). Chronicle of the Popes: The Reign-by-Reign Record of the Papacy from St. Peter to the Present, Thames & Hudson. ISBN 0-500-01798-0. "Sylvester
Maxwell-Stuart, P. G. Chronicle of the Popes: The Reign-by-Reign Record of the Papacy from St. Peter to the Present, Thames & Hudson, 2002, p. 47. ISBN 0500017980