1. Dayhoff MO (1978) Atlas of protein sequence and structure, vol 5, suppl 3. National Biomedical Research Foundation, Washington, DC
2. Dickerson RE (1971) J Mol Evol 1:26–45
3. Fitch WM (1980) J Mol Evol 16:153–209
4. Goodman M (1976) Protein sequences in phylogeny. In: Ayala FJ (ed) Molecular evolution. Sinauer, Sunderland, MA, p 141
5. Goodman M (1978) Substitutional trends and non-random changes in rates during protein evolution. In: Matsubara H, Yamanaka T (eds) Evolution of protein molecules. Tokyo, Japan Scientific Societies Press, p 17