PhosphoBase: a database of phosphorylation sites. - Nikolaj Blom; Andres Kreegipuu; Søren Brunak (Nucleic Acids Res., 1998)

PhosphoBase, a database of phosphorylation sites: release 2.0. - Andres Kreegipuu; Nikolaj Blom; Søren Brunak (Nucleic Acids Res., 1999)