Comparison of continuous epidural infusion of a local anesthetic and administration of systemic narcotics in the management of pain after total knee replacement surgery. - Raj,P.P.; Knarr,D.C.; Vigdorth,E.; Denson,D.D.; Pither,C.E.; Hartrick,C.T.; Hopson,C.N.; Edström,H.H. (Anesth. Analg., 1987)