A. Bolvig, “R.I. Moore: The Birth of Popular Heresy. Documents of Medieval History 1. Edward Arnold Ltd., London, 1975. 166 s. H. R. Loyn and ]. Percival: The Reign of Charlemagne. Documents of Medieval History 2. Edward Arnold Ltd., London, 1975. 164 s. - Begge bøger fås også i paperback udgave”., ht, bd. 13, jan. 1977.