1. Gotte, L., and Serafini-Fracassini, A., J. Atheroscler. Res., 3, 247 (1963).
2. Gotte, L., Mammi, M., and Pezzin, G., in Symposium on Fibrous Proteins (edit. by Crewther, W. G.), 236 (Butterworths, Australia, 1968).
3. Cox, R. C., and Little, K., Proc. Roy. Soc., B, 155, 232 (1961).
4. Mammi, M., Gotte, L., and Pezzin, G., Nature, 225, 380 (1970) (see preceding article).
5. Mammi, M., Gotte, L., and Pezzin, G., Nature, 220, 371 (1968); see also Chemistry and Molecular Biology of Intercellular Matrix (edit. by Balasz, E. A.) (in the press).