1 Chern S S, Do Carmo M, Kobayashi S. Minimal Submanifolds of a sphere with second fundamental form
of constant length. In: Functional Analysis and Related Fields. Berlin: Springer, 1970. 60-75
2 Gerald D, Ludden, Masafumi Okumura. Some integral formulas and their applications to hypersurfaces
of Sn
× Sn. JDG, 1974,9: 617-631
3 Chen Qing, Xu Senlin. Rigidity of Compact Minimal Submanifold in a Unit Sphere. Geometriae Dedicata,
1993,45: 83-88
4 Wu H X, Chen W H. Topics of Riemannian Geometry. Beijing: Beijing University Press, 19931 Chern S S, Do Carmo M, Kobayashi S. Minimal Submanifolds of a sphere with second fundamental form
of constant length. In: Functional Analysis and Related Fields. Berlin: Springer, 1970. 60-75
2 Gerald D, Ludden, Masafumi Okumura. Some integral formulas and their applications to hypersurfaces
of Sn
× Sn. JDG, 1974,9: 617-631
3 Chen Qing, Xu Senlin. Rigidity of Compact Minimal Submanifold in a Unit Sphere. Geometriae Dedicata,
1993,45: 83-88
4 Wu H X, Chen W H. Topics of Riemannian Geometry. Beijing: Beijing University Press, 1993