M. h. t. et sammendrag af disse buller, som blev sendt til ærkebiskoppen af Canterbury, kong Edward og rektoren ved Oxford universitet, henvises til Merle D´Aubignè: The History of the Reformation in the Sixteenth Century (London: Blackie and San, 1885), vol. IV, div. 7, p. 93, August Neander: General History of the Christian Religion and Church (Boston: Crocker and Brester, 1862), vol. V, pp. 146. 147. George Sergeant: History of the Christian Church (Dallas: Frederick Publishing House, 1948), p. 323, Gotthard V. Lechler: John Wycliffe and His Englich Precursors (London: The Religious Tract Society, 1878), pp. 162-164, Philip Schaff: History ofthe Christian Church (New York: Chas. Scribner's Sans, 1915), vol. V, part. 2, p.317.