Uniqueness of (dilatonic) charged black holes and black p-branes in   higher dimensions
  We prove the uniqueness of higher dimensional (dilatonic) charged black holes in static and asymptotically flat spacetimes for arbitrary vector-dilaton coupling constant. An application to the uniqueness of a wide class of black p-branes is also given. 
Gary W. Gibbons, Daisuke Ida and Tetsuya Shiromizu