1. Bedford, P. D. (1955). Lancet, 2, 259.
2. Berg, O., Nilsson, E., and Vinnars, E. (1957). Brit. J. Anaesth., 29, 146.
3. Vascular Disease of the Central Nervous;Blackwood, W.,1958
4. Bromage, P. R. (1953). Proc. roy. Soc. Med., 46, 919.
5. Interrelation of Physical and Physiological Factors. In Factors Regulating Blood Flow: Proc. 3rd Conf, Microcirculatory Physiology and Pathology, Milwaukee;Burton, A.C.;Anaesthesia; Committee upon Deaths Associated with Anaesthesia,1958