1. Premalignant lesions of the ampulla of Vater;Cattel, R.B.; Pyrtek, L.J.;Surg Gynec Obstet,1950
2. Adenomas of the gallbladder and extrahepatic bile duct;Hulten, J.; Johansson, H.; Olding, L.;Acta Chir Scand; Benign adenomatous polyps of the papilla of Vater,1970
3. Benign neoplasms of the extrahepatic biliary ducts. Review of the literature and report of a case of fibroma;Chu, P.T.;Arch Pathol,1950
4. Evolution of cancer of the colon and rectum;Morson, B.C.;Cancer,1974
5. Premalignancy of the mucosal polyps in the large intestine. I. Histologic gradation of the polyp on the basis of the epithelial pseudostratification and the glandular branching;Kozuka, S.;Dis Colon Rectum,1975