1. Golden, R.: Stomach. In Golden's Diagnostic Radiology, Section 5: Digestive Tract, Robbins, L.L., Golden, R., Cimmino, C.V., Collins, L.C., Dreyfuss, J.R., Janower, M.L., editors. Baltimore, Williams & Wilkins, 1969, pp. 161–412
2. Matsumoto, S., Ota, K.: Gastric neoplasms other than carcinoma; histological and statistical study on 1,489 resected stomachs. Gann47:143, 1956
3. Murakami, T., Hojo, Y., Ooba, K.: Studies on gastric polyp and polypoid cancer. Jpn. J. Cancer Clin. (Gan-No-Rinsho)2:544, 1956
4. Muto, M.: Stomach Cancer (from the Department of Surgery). Tokyo, Kanehara-Shoten, 1963
5. Nagayo, T.: Histological criteria of malignant transformation of gastric polyp and its results. Stomach and Intestine (I-to-Cho)30:301, 1975