Uniqueness Theorem for Generalized Maxwell Electric and Magnetic Black   Holes in Higher Dimensions
  Based on the conformal energy theorem we prove the uniqueness theorem for static higher dimensional electrically and magnetically charged black holes being the solution of Einstein (n-2)-gauge forms equations of motion. Black hole spacetime contains an asymptotically flat spacelike hypersurface with compact interior and non-degenerate components of the event horizon. 
Marek Rogatko