- MCW HealthLink - A look at coma and persistent vegetative state. Includes a discussion on treatments and prognosis.
- NINDS Information Page - Coma and persistent vegetative state data compiled by The National Institute of Neurological Disorders and Stroke.
- Responding to Patients in the Persistent Vegetative State - An Ethical and Legal Dilemma. - This article was published in Philosophia Christi 19.2 (Fall 1996): 55-83. This journal is a publication of the Evangelical Philosophical Society.
- World Medical Association - WMA policy: Statement on persistent vegetative state. Includes a definition, recovery and guidelines.