World Medical Association
- WMA policy: Statement on persistent vegetative state. Includes a definition, recovery and guidelines.
- http://www.wma.net/e/policy/17-v_e.html

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.
- http://www.crossrds.org/donal/pvs.htm

NINDS Information Page
- Coma and persistent vegetative state data compiled by The National Institute of Neurological Disorders and Stroke.
- http://www.ninds.nih.gov/health_and_medical/disorders/coma_doc.htm

MCW HealthLink
- A look at coma and persistent vegetative state. Includes a discussion on treatments and prognosis.
- http://healthlink.mcw.edu/article/921394859.html