Sutton, J. D., Mowlem, A., Owen, E., Russel, A. J. F., Smith, R. H., Stark, B. A., Treacher, T. T., Wilkinson, J. M. and Alderman, G. 1997. Nutrition of goats. Nutrition Abstracts And Reviews Series B: Livestock Feeds And Reviews. 10.
1991. AFRC Technical Committee on Responses to Nutrients, Report No 7, Theory of Responses to Nutrients by Farm Animals. Nutrition Abstracts And Reviews Series B: Livestock Feeds And Reviews. 61 (10), pp. 683-722.