1. Ames, B.N., and Gold, L.S (1990) Science249, 970–971.
2. Batlle, A.M.C., and Riley P.A . (1991) Cancer Journal4326–331.
3. Berenblum, L. (1974) In: Carcinogenesis as a Biological Problem. Elsevier: New York.
4. Cairns, J. (1981) Nature289, 353–357.
5. Cerutti, P.A . (1985) Science227, 375–381.