1. Beasts and other illusions;Chambers, D.,1984
2. Brain dead, brain absent, and brain donors;McCullagh, P.,1992
3. Medical futility, treatment withdrawal, and the persistent vegetative state;Mitchell, K.; Kerridge, I.; Lovat, T.;Journal of medical ethics,1993
4. See reference (3): 71.
5. See reference (3): 72.