1. Primmett, D. R., Norris, W. E., Carlson, G. J., Keynes, R. J. & Stern, C. D. Periodic segmental anomalies induced by heat shock in the chick embryo are associated with the cell cycle. Development 105, 119–130 (1989).
2. Primmett, D. R., Stern, C. D. & Keynes, R. J. Heat shock causes repeated segmental anomalies in the chick embryo. Development 104, 331–339 (1988).
3. Duboule, D. Temporal colinearity and the phylotypic progression: a basis for the stability of a vertebrate Bauplan and the evolution of morphologies through heterochrony. Development 135–142 (1994).
4. Summerbell, D., Lewis, J. H. & Wolpert, L. Positional information in chick limb morphogenesis. Nature 244, 492–496 (1973).
5. Lewis, J. H. Fate maps and the pattern of cell division: a calculation for the chick wing-bud. J. Embryol. Exp. Morphol. 33, 419–434 (1975).