1. Hardy, W. D. Jr. in Feline Leukemia Virus (eds Hardy, W. D. Jr, McClelland, A. J. & Essex, M.) 3–78 (Elsevier, New York, 1980).
2. Rickard, C. G., Post, J. E., de Noronha, F. & Barry, L. M. J. natn. Cancer Inst. 42, 987–1014 (1969).
3. Hoover, E. A., Perryman, L. E. & Kociba, G. J. Cancer Res 33, 145–152 (1973).
4. Hoover, E. A. et al. J. natn. Cancer Inst. 53, 1271–1276 (1974).
5. Mackey, L., Jarrett, W., Jarrett, O. & Laird, H. J. natn. Cancer Inst. 54, 209–217 (1975).