Wilkinson RG, Sinclair LS, Powles J and Minter CM. (2000) Response of lactating ewes grazing grass to variations in effective rumen degradable protein and digestible undegradable protein supply from concentrate supplements. Animal Science.71: 369-379
Wiseman, J., Powles, J. and Salvador, F. (1998) Comparison between pigs and poultry in the prediction of the dietary energy value of fats. Animal Feed Science and Technology.71: 1-9.
Powles, J., Wiseman, J., Cole, D.J.A. and Jagger, S. (1995) Prediction of the apparent digestible energy value of fats fed to pigs. Animal Production.61: 149-154.
Powles, J., Wiseman, J., Cole, D.J.A. and Hardy, B. (1994) Effect of chemical structure of fats upon their apparent digestible energy value when given to young pigs. Animal Production.58: 411-417.
Powles, J., Wiseman, J., Cole, D.J.A. and Hardy, B. (1993) Effect of chemical structure of fats upon their apparent digestible energy value when given to growing/finishing pigs. Animal Production.57: 137-146.
Powles, J. and Cole, D.J.A. (1993) Research examines use of lactose in young pig diets. Feedstuffs.65 (8): 13-16.