Marti-Renom MA, Pieper U, Madhusudhan MS, et al. DBAli tools: mining the protein structure space. Nucleic Acids Res. 2007;35:W393-7. Available at: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=17478513.