1. Doll, R., Muir, C., Waterhous, J.: Cancer Incidence in Five Continents, Vol. 2, Geneva, Switzerland, Springer Verlag, 1970, pp. 3–385
2. Segi, M., Kurihara, M.: Cancer Mortality for Selected Sites in 24 Countries, No. 6 (1966–1967). Tokyo, Japan Cancer Society, 1972
3. Palmer, W.L.: Carcinoma of the stomach. In Gastroenterology, 3rd edition. Bockus, H.L., editor. Philadelphia, W.B. Saunders Company, 1974, pp. 949–951
4. Ishikawa, T.: Cancer in young persons. Gann47:678, 1956
5. Smithies, F.: Gastric cancer in the young. J.A.M.A.62:1839, 1960