historia regum britanniae - References
- "Thorpeintro" - Lewis Thorpe, Introduction to The History of the Kings of Britain , Penguin, 1966, pp. 14-19
- A. O. H. Jarman - A. O. H. Jarman, Geoffrey of Monmouth , University of Wales Press, 1965, p. 17.
- 1 - Sir William Flinders Petrie, '''', 1917
- William R. Cooper - William R. Cooper, Chronicle of the Early Britons
(pdf), 2002, p. 68
- John - John Morris. The Age of Arthur: A History of the British Isles from 350 to 650. Barnes & Noble Books: New York. 1996 (originally 1973). ISBN 0-7607-0243-8