Ensembl 2009. - Tim J. P. Hubbard; Bronwen L. Aken; Sarah C. Ayling; Benoît Ballester; Kathryn Beal; Eugene Bragin; Simon Brent; Yuan Chen 007; Peter Clapham; Laura Clarke; Guy Coates; Susan Fairley; et al. (Nucleic Acids Res., 2009)