1. Andrews, K. et al. (1996). Misdiagnosis of the vegetative state: retrospective study in a rehabilitation unit.British Medical Journal, 313, 13–16.
2. Ashley, B. M. (1994). What is the end of the human person?: The vision of God and integral human fulfillment. In L. Gormally (Ed.), Moral truth and moral tradition: Essays in honor Of Peter Geach and Elizabeth Anscombe. Dublin: Four Courts Press.
3. Ashley, B. M., & O’Rourke, K. D. (1997).A theological analysis ( 4th ed.) Washington, DC:Georgetown University Press.
4. Ashley, B. M, & O’Rourke, K. D. (2002). Ethics of health care: An introductory textbook, (3rd ed.). Washington, DC: Georgetown University Press.
5. Balch, B. (2006, October). Breakthrough research shows consciousness in PVS patient, National Right to Life News, 33,20.