1. M. F. Fuller, In Vitro Digestition for Pigs and Poultry. The Rowett Research Institute Greenburn Road Bucksburn Aberdeen, XII. Wallingford C.A.B. International (1991).
2. V. C. Mason, Proceedings of the Nutritional Society43, 45 (1984).
3. J. H. Cummings, Lanceti, 1206 (1983).
4. A. C. Longland, In Vitro Digestion for Pigs and Poultry, 3. Wallingford C.A.B. International (1991).
5. H. Graham, In Vitro Digestion for Pigs and Poultry, 35. Wallingford C.A.B. International (1991).