1. California, Colorado, District of Columbia, Hawaii, Oregon, Vermont, and Washington by statute https://www.deathwithdignity.org/learn/death-with-dignity-acts/
2. Terminal Sedation: Source of a Restless Ethical Debate;Delden;Journal of Medical Ethics,2007
3. A. Hartocollis New York Times 2009
4. Attitudes and Practices of Euthanasia and Physician-Assisted Suicide in the United States, Canada, and Europe;Emanuel;Journal of the American Medical Association,2016
5. Bouvia v. Superior Court 1986