Simple derivation of dyadic Green functions of a simply moving,   isotropic, dielectric-magnetic medium
  Dyadic Green functions for time-harmonic fields in a homogeneous, isotropic, dielectric-magnetic medium, moving with constant velocity, are derived by first implementing a simple transformation and then using the dyadic Green functions available for uniaxial dielectric-magnetic mediums. 
Akhlesh Lakhtakia, Tom G. Mackay