Rotating charged Black Holes in Einstein-Born-Infeld theories and their   ADM mass
  In this work, the solution of the Einstein equations for a slowly rotating black hole with Born-Infeld charge is obtained. Geometrical properties and horizons of this solution are analyzed. The conditions when the ADM mass (as in the nonlinear static cases) and the ADM angular momentum of the system have been modified by the non linear electromagnetic field of the black hole, are considered. 
Diego Julio Cirilo-Lombardo