1. Berenblum, I. & Shubik, P. (1949) An experimental study of the initiating stage of carcinogenesis, and a re-examination of the somatic cell mutation theory of cancer. Br J Cancer, 3, 109–118.
2. Oppenheimer, B.S., Oppenheimer, E.T. & Stout, A.P. (1952) Sarcomas induced in rodents by imbedding various plastic films. Proc Soc Exp Biol Med, 79, 366–369.
3. Cowdry, E. (1955) Cancer Cells. W.B. Saunders, Philadelphia and London.
4. Furth, J. (1959) A meeting of ways in cancer research: thoughts on the evolution and nature of neoplasms. Cancer Res, 19, 241–258.
5. Berenblum, I. (1974) Carcinogenesis as a Biological Problem. North-Holland Publishig Company, Amsterdam, Oxford.