1) Gold, P. & Feedman, S. O.: Specific carcinoembryonic antigens of the human digestive system. J. Exp. Med., 122, 467, 1965
2) Abelev, G. I.: Alpha-fetoprotein in oncogenesis and its associations with malignant tumors. Adv. Cancer Res., 14, 295, 1971
3) Hill, B. R. & Levi, C.: Elevation of a serum component in neoplastic disease. Cancer Res., 14, 513, 1954
4) Koprowski, H. et al.: Colorectal carcinoma antigens detected by hybriodma antibodies. Somat, Cell Genest., 5, 957, 1979
5) Bjorklund, B.: Review of the immnochemical and clinical significance of TPA. Protides of the biological fluids, 24th collogium Brugers 1975, 505-512. Pergamon Press, Oxford, 1976