1. Principles of biomedical ethics;Beauchamp, T.; Childress, J.,1989
2. Philosophical medical ethics;Gillon, R.,1985
3. Recovery of patients after four months or more in the persistent vegetative state;Andrews, K.,1993
4. Persistent vegetative state and medical ethics;Gillon, R.,1993
5. Discussion paper on treatment of patients in persistent vegetative state-medical ethics committee of the BMA;British Medical Association,1992