1. Atlas of Protein Sequence and Structure 5, suppl. 3;Dayhoff,1978
2. Reconstructing history with amino acid sequences;Doolittle;Prot. Sci.,1992
3. Homology in classical and molecular biology;Patterson;Mol. Biol. Evol.,1988
4. Improved sensitivity in nucleic acid database searches using task specific scoring systems;States;Methods, A Companion to Methods in Enzymology,1992
5. Atlas of Protein Sequence and Structure 5, suppl. 3. Matrices for detecting distant relationships;Schwartz,1978