FITCH W, JONES JV, GRAHAM DI, MACKENZIE ET, HARPER AM. EFFECTS OF HYPOTENSION INDUCED BY HALOTHANE, ON THE CEREBRAL CIRCULATION IN BABOONS WITH EXPERIMENTAL RENOVASCULAR HYPERTENSION. British Journal of Anaesthesia. 1978 Feb;50(2):119–25. doi: 10.1093/bja/50.2.119.