% 20383000 
@Article{pmid20383000,
   Author="Cowtan, K. ",
   Title="{{R}ecent developments in classical density modification}",
   Journal="Acta Crystallogr. D Biol. Crystallogr.",
   Year="2010",
   Volume="66",
   Number="Pt 4",
   Pages="470--478",
   Month="Apr"
}