@Book{abramowitz+stegun,
   author    = "Milton {Abramowitz} and Irene A. {Stegun}",
   title     = "Handbook of Mathematical Functions with
                Formulas, Graphs, and Mathematical Tables",
   publisher = "Dover",
   year      =  {1964},
   address   = "New York",
   edition   = "ninth Dover printing, tenth GPO printing"
  }