1. Gastric aspiration in haematemesis;Chandler, G.N.; Watkinson, G.;Lancet,1953
2. Amir-Ahmadi, H., McCray, R. S., Martin, F., Mitch, W., Kantrowitz, P. A., and Zamcheck, N. (1969).
3. Early endoscopic diagnosis of acute upper gastrointestinal hemorrhage: demonstration of relatively high incidence of erosions as a source of bleeding;Katz, D.; Douvres, P.; Weisberg, H.; McKinnon, W.; Glass, G.B.J.;J. Amer. med. Ass,1964
4. Observations on vigorous diagnostic approach to severe upper gastrointestinal haemorrhage;Palmer, E.D.;Ann. intern. Med,1952
5. Gastrointestinal haemorrhage and salicylates;Alvarez, A.S.; Summerskill, W.H.J.;Lancet,1958