1. Piez, K. A., in Treatise on Collagen (edit. by Ramachandran, G. N.), 207 (Academic Press, New York, 1967).
2. Carmichael, D. J., and Lawrie, R. A., Brit. J. Food Technol., 2, 299 (1967).
3. Kauffman, R. G., Carpenter, Z. L., Bray, R. W., and Hoekstra, W. G., J. Agric. Food Chem., 12, 504 (1964).
4. Jackson, D. S., and Cleary, E. G., in Methods of Biochemical Analysis (edit. by Glick, D.), 25 (Interscience Publishers, New York, 1967).
5. Gallop, P. M., and Seifter, S., in Methods in Enzymology (edit. by Colowick, S. P., and Kaplan, N. O.), 635 (Academic Press, New York, 1963).