1. Bengmark, S., Liljedahl, S.-O., Scherstén, T., Smedby, B., Sterky, G., Wedel, H.: The length of stay following operations for gallstones. Läkartidningen76:3989, 1979
2. The National Central Bureau of Statistics: In-patient statistics 1977 and 1981 in somatic hospitals. Surgical operations, E. Rapaport, editor. Stockholm, Liber Distribution, 1982 and in press, pp. 107–108 and pp. 96–97
3. Bennett, M.T., Sheldon, M.I., dos Remedios, L.V., Weber, P.M.: Diagnosis of acute cholecystitis using hepatobiliary scan with technetium-99m PIPIDA. Am. J. Surg.142:338, 1981
4. Glenn, F.: Surgical management of acute cholecystitis in patients 65 years of age and older. Ann. Surg.193:56, 1981
5. Glenn, F., Dillon, L.D.: Developing trends in acute cholecystitis and choledocholithiasis. Surg. Gynecol. Obstet.151:528, 1980