Palémon Glorieux, La littérature quodlibétique de 1260 à 1320, Vol. 1 (Le Saulchoir, 1929), p. 230.
gcatholic.org
Conradus Eubel, Hierarchia catholica medii aevi Tomus I, editio altera (Monasterii 1913) p. 10. Lorenzo Cardella, Memorie delle' cardinali della Santa Romana Chiesa II (Rome 1793), p. 25, reports that he had been Bishop of Evreux; there was a Geoffrey de Bar, Bishop of Evreux, from 1298-1299, obviously not the same person; cf. Eubel, p. 234. Titular Church of S. Susanna (G-Catholic).
