1. Lance-Jones, C. & Landmesser, L. Proc. R. Soc. B214, 1–18 (1981).
2. Hollyday, M. Curr. Topics dev. Biol. 15, 181–215 (1980).
3. Hollyday, M. in Limb Development and Regeneration (eds Fallon, J. F. & Caplan, A. L.) 183–193 (Liss, New York, 1983).
4. Landmesser, L. A. Rev. Neurosci. 3, 279–302 (1980).
5. Pettigrew, A., Lindeman, R. & Bennett, M. R. J. Embryol. exp. Morph. 49, 115–137 (1979).