Asymptotic Reissner-Nordstrom black holes
  We consider two types of Born-Infeld like nonlinear electromagnetic fields and obtain their interesting black hole solutions. The asymptotic behavior of these solutions is the same as that of Reissner-Nordstrom black hole. We investigate the geometric properties of the solutions and find that depending on the value of the nonlinearity parameter, the singularity covered with various horizons. 
Seyed Hossein Hendi
gr-qc hep-th math-ph math.MP