1. Bregliano, J. C. & Kidwell, M. G. in Mobile Genetic Elements (ed. Shapiro, J.) 363–410 (Academic, New York, 1983).
2. Bucheton, A., Paro, R., Sang, H. M., Pélisson, A. & Finnegan, D. J. Cell 38, 153–163 (1984).
3. Finnegan, D. J. & Fawcett, D. H. in Oxford Surveys on Eucaryotic Genes Vol. 3 (Oxford University Press, in the press).
4. Throckmorton, L. H. in Handbook of Genetics Vol. 3 (ed. King, R. C.) 421–469 (Plenum, New York, 1975).
5. Lemeunier, F., David, J., Tsacas, L & Ashburner, M. in The Genetics and Biology of Drosophila Vol. 3e (eds Ashburner, M., Carson, H. L. & Thompson, J. N.) (Academic, London, in the press).