1. The relation between the divergence of sequence and structure in proteins, EMBO J;C Chothia,1986
2. Mapping the protein universe, Science;L Holm,1996
3. Comparison of solvent inaccessible cores of homologous proteins: Definitions useful for protein modelling, Protein Eng;TJ Hubbard,1987
4. SCOP database in 2004: refinements integrate structure and sequence family data. Nucl. Acid Res;A Andreeva,2004
5. SCOP: A structural classification of proteins database, Nucleic Acids Res;L Lo Conte,2000