共 21 条
- [3] STRUCTURE OF COMPLETE MANIFOLDS OF NONNEGATIVE CURVATURE [J]. ANNALS OF MATHEMATICS, 1972, 96 (03) : 413 - 443
- [4] Cheng S. Y., 1980, Geometry of the Laplace operator (Proc. Sympos. Pure Math., Univ. Hawaii, Honolulu, Hawaii, 1979), VXXXVI, P147
- [8] Green R.E., 1979, LECT NOTES MATH, V699