5Yamamoto K. Intrahepatic periduetal glands and their significance in primary intrahepatic lithiasis, Jpn J of Surg,1982: 3:163.
6Terada T, Nakanuma Y, Ohta G. Glandular elements round the intrahepatic bile ducts in man: their morphology and distribution in normal livers. Liver, 1987: 7:1.
8Yasuni Nakanuma,Tadashi Terada,Yoshinori Tanaka,Goroku Ohta. Are hepatolithiasis and cholangiocarcinoma aetiologically related?[J] 1985,Virchows Archiv A Pathological Anatomy and Histopathology(1):45～58
