1. A. Back, M. do Carmo, and W. Y. Hsiang, On some fundamental equations of equivariant riemannian geometry, preprint.
2. Les variétés riemanniennes homogènes simplement connexes de dimension impaire à courbure strictement positive;Berard-Bergery, L.;J. Math. Pures Appl. (9),1976
3. General position of equivariant maps;Bierstone, Edward;Trans. Amer. Math. Soc.,1977
4. Some examples of manifolds of nonnegative curvature;Cheeger, Jeff;J. Differential Geometry,1973
5. W. T. Hsiang and W. Y. Hsiang, On the construction of exotic and/or knotted minimal spheres in the standard Riemannian sphere by means of equivariant differential geometry, preprint.