A class of solutions for Einstein field equations with spatially varying   cosmological constant in spherically symmetric anisotropic source
  In this work a class of interior solution for Einstein field equations corresponding to a spherically symmetric anisotropic fluid sphere has been obtained under the assumption that the cosmological constant is spatially variable. The solution obtained has the characteristics that the pressure and the cosmological parameter vanish at the centre and at the boundary with a maximum value somewhere inside the body. It has been argued that a variable $ \Lambda $ is as much important physically in Astrophysics as in Cosmology. 
R. N. Tiwari and Saibal Ray
gr-qc