1. Anglade, P., Robin, J.C. & Roehrich, R., 1963. Observations de 1963 sur les migrations de la piéride du chou (Pieris brassicae L.) Lepidoptera: Pieridae, dans le sud ouest. Rev. zool. Agric. 10–12: 98–102.
2. Bailey, L.H., 1927. The Standard Cyclopedia of Horticulture. I. Macmillan, London.
3. Baker, P.J., 1978. Dungeness, Kent, 10th/11th September, 1977. Proc. Brit. Ent. nat. Hist. Soc. 11: 130–131.
4. Baker, R.R., 1968a. Possible method of evolution of the migratory habit in butterflies. Phil. Trans. R. Soc. Lond. B. 253: 309–341.
5. Baker, R.R., 1968b. Sun orientation during migration in some butterflies. Proc. R. ent. Soc. Lond. A. 43: 89–95.