1. Hagey LR, Crombie DL, Espinosa E, Carey MC, Igimi H, Hofmann AF. Ursodeoxycholic acid in the Ursidae: biliary bile acids of bears, pandas, and related carnivores. J Lipid Res 1993;34:1911-1917.
2. Pharmacology of Ursodeoxycholic Acid, an Enterohepatic Drug
3. Ursodeoxycholic acid therapy of chronic cholestatic conditions in adults and children
4. Sugata F, Shimizu M. [Retrospective studies on gallstone disappearance (author's transl)]. Nihon Shokakibyo Gakkai Zasshi 1974;71:75-80.
5. Ursodeoxycholic acid in the treatment of cholesterol cholelithiasis