1. Previero A., Path. Biol.25, 81 (1977).
2. Zuckerkandl E., J. Mol. Evol.7, (1965).
3. Galzigna L., Against Biological Determinism (Rose S., ed.), pp. 136–150. London: Allison & Bubsy. 1982.
4. Dayhoff M. O., Atlas of Protein Sequence and Structure5, Natl. Biomed. Res. Found., Washington. 1972.
5. Bridgen J.,Walker I. D.,Walker J. E.,Muirhead H.,Pain R. H., Amino Acids, Peptides and Proteins (Sheppard R. C., ed.),7, 31–147. The Chemical Soc. London: 1976.