共 13 条
[1]
Berger M., 1960, ANN SCUOLA NORM SUP, V14, P161
[2]
BISHOP K, 1964, GEOMETRY MANIFOLDS
[3]
CERF J, 1968, LECTURE NOTES MATHEM
[4]
CHEEGER J, 1975, COMPARISON THEOREMS, V9
[5]
GROMOLL D, 1975, LECTURE NOTES MATHEM
[7]
Klingenberg W., 1961, COMMENT MATH HELV, V35, P47
[8]
Munkres J. R., 1958, NOTICES AMS, V5, P582
[9]
MYERS SB, 1935, DUKE MATH J, V1, P39