Clark M, Longman AJ, Lindstrom B: A retrospective view of bereavement in a hospice program. In Death: Completion and discover. CA Corr and R Pochoiski (eds), Lakewood, OH, Association for Death Education and Counseling, 1987:197-205
2.
Lindstrom B: Exploring paranormal experiences of the bereaved. In creativity in death education and counseling. CA Corr, J Stillion, MC Libar (eds), Lakewood, OH, Forum for Death Education and Counseling,-1983:137-143
3.
Parkes CM: Bereavement: Studies of grief in adult life. New York, Tavistock, London and International Universities Press, 1972
4.
Rees WE: The hallucinations of widowhood. British Medical Journal, 1971;4:37-37
5.
Bowlby J: Attachment and loss. New York, Basic Books, Inc, 1980
6.
Moss T: The probability of the impossible. New York, New American Library, 1974
7.
Heywood R: Death and psychical research: The present position regarding the evidence of survival. In death: Current perspectives. ES Shneidman (ed), Mayfield Publishing Co, 1975:58-62
8.
Marks DF: Investigating the paranormal. Nature, 1986;320(6058):119-124