1. 1964 Changes in the protein and non-protein nitrogen in the digesta of sheep. In: The Role of the Gastrointestinal Tract in Protein Metabolism, ed Blackwell Scientific Publications, Oxford, UK, pp 175–285.
2. 1947 The Amino Acid Composition of Proteins and Foods. Analytical Methods and Results. C C Thomas, Springfield, IL, USA.
3. 1989 The Merck Index: An Encyclopedia of Chemicals, Drugs and Biologicals (11th edn). Merck & Co, Inc, Rahway, USA, p 1596.
4. Endogenous amino acid flow at the terminal ileum of the rat determined under conditions of peptide alimentation