Fernández-Suárez, X. M.; Rigden, D. J.; Galperin, M. Y. (5 Aralık 2013). "The 2014 Nucleic Acids Research Database Issue and an updated NAR online Molecular Biology Database Collection". Nucleic Acids Research. 42 (Database issue). ss. D1-D6. doi:10.1093/nar/gkt1282. PMC3965027 $2. PMID24316579.
Fernández-Suárez, X. M.; Rigden, D. J.; Galperin, M. Y. (5 Aralık 2013). "The 2014 Nucleic Acids Research Database Issue and an updated NAR online Molecular Biology Database Collection". Nucleic Acids Research. 42 (Database issue). ss. D1-D6. doi:10.1093/nar/gkt1282. PMC3965027 $2. PMID24316579.