1. Genstat 5 Committee, 1993. Genstat 5 Release 3, Reference Manual. Oxford University Press, Oxford
2. Gunn, R.G., 1983. The influence of nutrition on the reproductive performance of ewes, In: Haresign, W. (Ed.), Sheep Production. London, Butterworths, pp. 99–110
3. Embryo mortality in Scottish Blackface ewes as influenced by body condition at mating and by post-mating nutrition;Gunn;J. Agric. Sci., Camb.,1972
4. The effect of level of nutriton prior to mating on the reproductive performance of ewes of two Welsh breeds in different levels of body condition;Gunn;Anim. Prod.,1991
5. Effects of nutrition in utero and in early life on the subsequent lifetime reproductive performance of Scottish Blackface ewes in two management systems;Gunn;Anim. Sci.,1995