1. Ong, G.B.: A study of recurrent pyogenic cholangitis. Arch. Surg.84:63, 1962
2. Cook, J., Hon, P.C., Ho, H.C., McFadzean, A.J.S.: Recurrent pyogenic cholangitis. Br. J. Surg.42:188, 1954
3. Nakayama, F., Soloway, R.D., Nakama, T., Miyazaki, K., Ichimiya, H., Sheen, P.C., Ker, C.G., Ong, G.B., Choi, T.K., Boey, J., Foong, W.C., Tan, E.C., Tung, K.H., Lee, C.N.: Hepatolithiasis in East Asia, retrospective study. Dig. Dis. Sci.31:21, 1986
4. Wong, J., Choi, T.K.: Recurrent pyogenic cholangitis. In Intrahepatic Calculi, K. Okuda, F. Nakayama, J. Wong, editors, New York, Alan R. Liss, Inc., 1984, pp. 175–192
5. Tabata, M., Nakayama, F.: Bacteriology of hepatolithiasis. Prog. Clin. Bio. Res.152:163, 1984