1. Spirituality, Healing, and Medicine: Return to the Silence;Aldridge,2000
2. Western Attitudes toward Death: From the Middle Ages to the Present;Arìes,1974
3. Terminal sedation: pulling the sheet over our eyes;Battin;Hastings Center Report,2008
4. The Denial of Death;Becker,1973
5. “Euthanasia”: a survey by the Swiss Association for Palliative Care;Bittel;Supportive Care in Cancer,2002