1. American College of Physicians Ethics Manual
2. Deciding to forego life-sustaining treatment: Ethical, medical and legal issues in treatment decisions;President's Commission for the Study of Ethical Problems in Medicine and Biomedical and Behavioral Research,1983
3. AMA: decisions near the end of life;Council on Ethical and Judicial Affairs;JAMA,1992
4. Decisions near the end of life: professional views on life-sustaining treatment;Solomon;Am J Public Health,1993
5. The imprecise language of euthanasia and causing death;Devettere;J Clin Ethics,1990