1Niemand. Praklikum der Hunde[M]. Berlin: Parey Buchver lage,2001:824-826.
2Corpechot C, Carrat F, Bonnand A, et al. An effect of ur-sodeoxyeholieacid therapy on liver fibrosis progression in pri mary biliary eirrhosis[J].Hepatology, 2000, 32(12):1196-1199.