1. The national traumatic coma data bank;Marshall;J Neuro Surg,1983
2. Is the patient dead, vegetative or severely neurologically impaired?;Booth;JAMA,2004
3. Motor profile of patients in minimally responsive and persistent vegetative states;Pilon;Brain Inj,1996
4. Guide to Physical Therapist Practice,2001
5. Coma and Impaired Consciousness;Young,1998