Database resources of the National Center for Biotechnology Information. - David L. Wheeler; Tanya Barrett; Dennis A. Benson; Stephen H. Bryant; Kathi Canese; Deanna M. Church; Michael DiCuccio; Ron Edgar; Scott Federhen; Wolfgang Helmberg; David L. Kenton; Oleg Khovayko; et al. (Nucleic Acids Res., 2005)

Database resources of the National Center for Biotechnology Information. - David L. Wheeler; Tanya Barrett; Dennis A. Benson; Stephen H. Bryant; Kathi Canese; Vyacheslav Chetvernin; Deanna M. Church; Michael DiCuccio; Ron Edgar; Scott Federhen; Lewis Y. Geer; Wolfgang Helmberg; et al. (Nucleic Acids Res., 2006)