1. Cantu, R. C., Ames, A., Diviacinto, G., Dixon, J.: Hypotension: A mayor factor limiting recovery from cerebral ischaemia. J. Surg. Res.9, 525 (1969).
2. Chauchard, A., Chauchard, B.: Role des collatérales des artères vertébrales et carotides dans l'irrigation de l'écorce cérébrale. C. R. Soc. Biol. (Paris)99, 1628 (1928).
3. Cooper, A.: Some experiments and observations on tying the carotid and vertebral arteries. Guy's Hosp. Rep.1, 457 (1836).
4. Hill, L.: On cerebral anemia and the effects which follow ligation of the cerebral arteries. Phil. Tr. Roy. Soc. (Lond.)193, 69 (1900).
5. Hossmann, K.-A., Sato, K.: The effect of ischemia on sensorimotor cortex of cat. Z. Neurol.198, 33 (1970).