1. Pure and Applied Mathematics, Vol. XI;Goldberg, Samuel I.,1962
2. The conformal transformation group of a compact homogeneous Riemannian manifold;Goldberg, Samuel I.;Bull. Amer. Math. Soc.,1962
3. Sur les transformations conformes d’une variété riemannienne compacte;Lichnerowicz, André;C. R. Acad. Sci. Paris,1964
4. The conformal transformation on a space with parallel Ricci tensor;Nagano, Tadashi;J. Math. Soc. Japan,1959