1. Wigglesworth VB (1961) Symp R Entomol Soc London 1:103–114
2. Williams CM, Kafatos FC (1971) Mitt Schweiz Entomol Ges 44:151–162
3. Riddiford LM (1981) Am Zool 21:751–762
4. Nijhout HF, Wheeler DE (1982) Q Rev Biol 57:109–133
5. Laufer H (1983) In: Downer RGH, Laufer H (eds) Endocrinology of insects. Liss, New York, pp 203–216