1. Al-Rabbal, M. F., Baldwin, R. L. and Weir, W. C. (1971). Microbial growth dependence on ammonia nitrogen in the bovine rumen. A quantitative study. J. Dairy Sci., 54, 1162–1172
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3. Baldwin, R. L., Koong, L. J. and Ulyatt, M. J. (1977). The formation and utilization of fermentation end-products. Mathematical models, pp. 347–391. In R. T. J. Clarke and T. Bauchop (eds.): Microbial Ecology of the Normal Gut. (London: Academic Press)
4. Baldwin, R. L. and Denham, S. C. (1979). Quantitative and dynamic aspects of nitrogen metabolism in the rumen. A modelling analysis. J. Dairy Sci. (In press)
5. Bard, Y. (1974). Non-Linear Parameter Estimation. (New York: Academic Press)