1. Hassell, M. P., Comins, H. N. & May, R. M. Nature 353, 255–258 (1991).
2. Rohani, P. & Miramontes, O. Proc. R. Soc. Lond. B 260, 335–342 (1995).
3. Bascompte, J. & Sole, R. Trends Ecol. Evol. 10, 361–366 (1995).
4. Elton, C. Voles, Mice and Lemmings. Problems in Population Dynamics (Clarendon, Oxford, 1942).
5. Teivainen, T. Folia Forestalia 387, 1–23 (1979).