3Guit JBM, Koning HM, Coster ML, et al. Ketamine as analgesic for total intravenous anaesthesia with propofol. Anaesthesia, 1991,46:84.
4Blockmans D, Hemlrijck JV, Aken HV. Ketamine does not prevent hypotension caused by induction of anaethesia with propofol in eldrly patients. Anasthsia,1993,70(Suppl):A40..
5Mcclune S, Mckay AC, Wright PMC, et al. Synergistic interaction between midazolam and propofol.Br J Anaesth,1992,69:240.