1. Calculus Disease of the Bile Ducts;Wurbs,1987
2. Foreign bodies in the biliary tiact;Toland;Ann Surg,1933
3. Silk ligature as a cause of choledocholithiasis after cholecystectomy;Ahlberg;Acta Chir Scand,1959
4. Clinical observations on complications from non-absorbs hie suture material in gall bladder surgery;Silvennoinen;Acta Chir Scand,1966
5. Silk: the nidus of a common bile duct calculus;Sigler;Surgery,1969