Illius, A.W., and Gordon, I.J. (1999) Scaling up from functional response to numerical response in vertebrate herbivores. In: Olff, H., Brown, V.K., and Drent, R.H., (eds.) Herbivores: between plants and predators. Blackwell Science, Malden, MA, USA, pp. 397-425.

Illius, A.W., Derry, J.F., and Gordon, I.J. (1999) A re-assessment of the value of strategies for tracking climatic variation in semi-arid grazing systems. In: People and Rangelands: building the future: proceedings from the 6th International Rangeland Congress (1) pp. 504-505. From: 6th International Rangeland Congress, 19-23 July 1999, Townsville, QLD, Australia.

Illius, A.W., and Gordon, I.J. (1990) Constraints on diet selection and foraging behaviour in mammalian herbivores. In: NATO ASI Series (20) pp. 369-393. From: NATO Advanced Research Workshop on Behavioural Mechanisms of Food Selection, 17-21 July 1989, Gregynog, UK.