On the equilibrium state of two rotating charged masses in General   Relativity
  This paper is a direct continuation of our old publication where it was found the exact solution of the Einstein-Maxwell equations for two static sources of Reissner-Nordstrom type in the state of the physical equilibrium. Here we present the exact solution of these equations for the case of two rotating charged sources and we proved the existence of the physical equilibrium state also for this general case. 
G. A. Alekseev and V. A. Belinski
gr-qc astro-ph.HE