1. , . Pathologic basis of disease. 3rd ed. Philadelphia: Saunders, 1984; 954–5.
2. Diseases of the gallbladder and bile ducts. In: , , , , eds. Harrison's principles of internal medicine. 9th ed. New York: McGraw-Hill, 1980; 1489–97.
3. Cancer of the bile duct: The occult malignancy