Anisotropic Spheres with Barotropic Equation of State in Bimetric Theory   of Relativity
  Recently, Khadekar (2007) presented the solutions with uniform energy density for anisotropic spheres in bimetric theory. We present here a general analytic solution to the field equations in bimetric theory for anisotropic fluids for a general barotropic equation of state by representing equations in terms for effective radial pressure . We list and discuss some old and new solutions which fall in this category. 
Naveen Bijalwan
physics.gen-ph