1. Cholecystectomy without drainage; report of eighty-six consecutive cases without mortality;Verbrycke;Mod J Rec,1927
2. Cholecystectomy with and without surgical drainage;Goldberg;Am J Surg,1975
3. A controlled trial of drainage after cholecystectomy;Gordon;Br J Surg,1976
4. Cholecystectomy without drainage;Kambouris;Surg Gynecol Obstet,1973
5. Sump-suction drainage of subhepatic space after cholecystectomy;Polk;Surgery,1973