1. Bishop, J. M. A. Rev. Biochem. 52, 301–354 (1983).
2. Bister, K. & Duesberg, P. H. in Advances in Viral Oncology Vol. 1 (ed. Klein, G.) 3–42 (Raven, New York, 1982).
3. Beard, J. W. in Viral Oncology (ed. Klein, G.) 55–87 (Raven, New York, 1980).
4. Carr, J. G. Br. J. Cancer. 14, 77–82 (1980).
5. Alexander, R. W., Moscovici, C. & Vogt, P. K. J. natn. Cancer Inst. 62, 359–366 (1979).