1. Van Lommel P, van Wees R, Meyers V, Elfferich I. Near-death experience in survivors of cardiac arrest: a prospective study in the Netherlands. Lancet 2001;358:2039-45.
2. Athappilly GK, Greyson B, Stevenson I. Do Prevailing Societal Models Influence Reports of Near-Death Experiences?: A Comparison of Accounts Reported Before and After 1975. J Nerv Ment Dis 2006;194:218-22
3. Plato. The Republic, Book X, (translated by Jowett B), 360 BC. http://classics .mit.edu/Plato/republic.html
4. Bede. A history of the English Church and people (translated by Sherley-Price L.) Penguin classics. 1955.
5. Jones DG. Excerpts from Recollections of an Old Soldier: The Life of Captain David Perry. Combined electronic edition, 1998. (Derived from first edition, Windsor, Vermont, 1822, and subsequent other editions.) http://homepages.rootsweb.com/~dagjones/docs/.