Transforming the Einstein static Universe into physically acceptable   static fluid spheres II: A two - fold infinity of exact solutions
  Following a solution generating technique introduced recently by one of us, we transform the Einstein static Universe into a two - fold infinity class of physically acceptable exact perfect fluid solutions of Einstein's equations. Whereas the entire class of solutions can be considered as generalizations of the familiar Tolman IV solution, no member of the class can be written explicitly in isotropic coordinates. Further, except for a set of measure zero, no member of the class can be written explicitly in curvature coordinates either. 
C\'edric Grenon, Pascal J. Elahi and Kayll Lake