Black holes with magnetic charge and quantized mass
  We examine the issue of magnetic charge quantization in the presence of black holes. It is pointed out that quantization of magnetic charge can lead to the mass quantization for magnetically charged black holes. We also discuss some implications for the experimental searches of magnetically charged black holes. 
A.Yu.Ignatiev, G.C.Joshi (University of Melbourne) and Kameshwar   C.Wali (Syracuse University)