Some static spherically symmetric interior solutions of $f(R)$ gravity
  We have found some new exact static spherically symmetric interior solutions of metric $f(R)$ gravitational theories describing the equilibrium configuration of a star. Then the solution is matched to the exterior solution and thus gives a complete description of a star in $R^{1-n/2}$ theory. 
Ali Shojai and Fatimah Shojai
gr-qc