1. Carrillo H, Lipman D (1988) The multiple sequence alignment problem in biology. SIAM J Appl Math 48:1073–1082
2. Gupta SK, Kececioglu JD, Schaffer AA (1995) Improving the practical space and time efficiency of the shortest-paths approach to sum-of-pairs multiple sequence alignment. J Comput Biol 2:459–472
3. Kawashima S, Pokarowski P, Pokarowska M, Kolinski A, Katayama T, Kanehisa M (2008) AAindex: amino acid index database, progress report 2008. Nucleic Acids Res 36:D202–D205
4. Dayhoff MO, Schwartz RM, Orcutt BC (1978) A model of evolutionary change in proteins. In: Dayhoff MO (ed) Atlas of protein sequence and structure, vol 5, Suppl. 3. National Biomedical Research Foundation, Silver Spring, MD, pp 345–352
5. Chiaromonte F, Yap VB, Miller W (2002) Scoring pairwise genomic sequence alignments. In: Altman RB, Dunker AK, Hunter L, Klein TED, Lauderdale K (eds) Pacific symposium on biocomputing. World Scientific, Singapore, pp 115–126