Foxe & Townsend 1837, p. 121. Foxe, John; Townsend, George (1837). The Acts and Monuments of John Foxe: With a Preliminary Dissertation by the Rev. George Townsend. R.B. Seeley and W. Burnside, sold by L. & G. Seeley. p. 121.
Kirsch 1907 cites Bull "Excelsus Dominus" in Bullarium Romanum, Turin ed., VI, 18 sqq. Kirsch, Johann Peter (1907). "St. Benno" . In Herbermann, Charles (ed.). Catholic Encyclopedia. Vol. 2. New York: Robert Appleton Company.
Kirsch 1907 cites Luther Wider den neuen Abgott and alten Teufel, der zu Meissen soli erhoben werden. Kirsch, Johann Peter (1907). "St. Benno" . In Herbermann, Charles (ed.). Catholic Encyclopedia. Vol. 2. New York: Robert Appleton Company.