Barrett, WF (1926). Death Bed Visions. London: Methuen.

Chorvinsky, M. (1992). Our strange world. Fate, 45(7),31-35.

Chorvinshy, M. (1993). Our strange world. Fate, 46(5), 22-26.

Clark, K. (1984). Clinical interventions with near-death experiencers. In B. Greyson and Cobbe, F. (1882). Peak in Darien Experiences. London: Williams and Morgate Press.

Easton, E., MacKenzie, F. (1988). Sensory-perceptual alterations: delirium in the intensive care unit. Heart and Lung. 17:229-37.

Elliott, R, Wright, L. Verbal communication: what do critical care nurses say to their unconscious or sedated patients? Journal of Advanced Nursing 1999, Jun: 29 (6):1412-20.

Evans BM. (1976). Patterns of arousal in comatose patients. J. Neurol Neurosurg Psychiatr. 39:392-402.

Gabbard, G., Twenlow, S., Jones, F., (1981). Do "Near-death experiences" occur only near-death? The Journal of Nervous and Mental Disease169:374-377.

Germine, M. (1991), Consciousness and Synchronicity. Medical Hypotheses, 36, 277-283.

Gimenez, R. (1992). A metaphysical journey in a comatose state. Clinical Nurse Specialist 6(4) 191-194.

Godwin, M. (1994). The lucid dreamer. New York: Simon & Schuster.

Green, A. An explorative study of patients’ memory recall of their stay in an acute intensive therapy unit. Intensive and Critical Care Nursing, 1996: 12:3, 131-137.

Greyson, B. (1981). Toward a psychological explanation of near-death experiences. Anabiosis: the Journal of Near-Death Studies, 1, 88-103.

Greyson, B. (1983). The psychodynamics of near-death experiences. Journal of Nervous and Mental Disease, 171, 376-381.

Guyton, A. (1991) Textbook of Medical Physiology. Philadelphia: W.B. Saunders Company.

Jacobsen, A F . Research for practice: Caring for unconscious patients. Am J Nurs., 2000 Jan 100 (1): 69

Jennett B. & Teasdale G. (1977) Aspects of coma after severe head injury. Lancet. 1:878-881.

Lawrence, M. (1997) In a world of their own experiencing unconsciousness. Westport, Ct.:Greenwood Publishing Group.

Lawrence M (1995). The unconscious experience. American Journal of Critical Care (3) 227-232.

Lawrence M. (1995). Paranormal experiences of previously unconscious patients. Proceedings of an International Conference: Parapsychology and Thanatology. 122-148.

Leigh, K. Communicating with unconscious patients. Nursing times. 97 (48):35-6,2001 Nov 29-Dec 5.

Lindal, E. et al, (1994) The qualitative difference of visions and visual hallucinations: a comparison of a general-population and clinical sample. Compr-Psychiatry. 35(5):405-8.

Moody RA. (1975). Life After Life. Covington, Ga:Mockingbird Books.

Porth, C.M. (1998). Pathophysiology: concepts of altered health states - 5th ed. Lippincott-Raven Publishers

Olson, M. (1988). The incidence of out-of-body experiences in hospitalized patients. Journal of Near-Death Studies, 62,3,169-174.

Osis, K. (1974). Out-of-body research at the American Society for Psychical Research. ASPR Newsletter, 1(27),1-3.

Osis,K. (1961). Deathbed Observation by Physicians and Nurses. New York: Parapsychology Foundation.

Ring, K. (1980). Life at Death: A scientific investigation of the near-death experience. New York: Coward, McCann and Geoghegan.

Ring, K. Rosing, C.(1990). The Omega Project:an empirical study of the NDE-prone personality. Journal of Near-Death Studies. 8(4)211-239.

Ring, K. Lawrence, M. (1993). Further Evidence For Veridical Perception During Near-Death Experiences. Journal of Near-Death Studies, Summer 223-229.

Rogo, S. (1984). Researching the out-of-body experience: the state of the art. Anabiosis Journal of Near-Death Studies. 4:21-49.

Sabom, M. (1982). Recollections of Death. New York: Harper and Row.

Schnaper, N. (1975). The psychological implications of severe trauma:emotional sequelae to unconsciousness. Journal of Trauma 15::94-98.

Tosch P. (1988). Patients' recollections of their posttraumatic coma. J Neuroscience Nursing, 20:223-228.

Troost, B., Hutchings, L. (1989). Eye movements in loss of Consciousness. Bul. Soc. beige Ophtalmol.,237, 209-226.