• W. Ford, Michael, (2006) Book of the Witch Moon Choronzon Edition: Chaos, Vampiric & Luciferian Sorcery p. 17, Succubus Publishing; Choronzon edition ISBN 1-4116-8136-3
• Lurker, Manfred (Ger. 1984, Eng. 1987) The Routeledge Dictionary of Gods, Goddesses, Devils and Demons p. 9, Routeledge & Kegan, ISBN 0-415-34018-7
• Curran, Dr. Bob (2005),Vampires: A Field Guide to the Creatures that Stalk the Night p. 17, 18, 19, 20, 21, Career Press, ISBN 1-56414-807-6
This is from the book A Field Guide to the Creatures that Stalk the Night
