共 5 条
[1]
ELLIS GFR, 1971, GENERAL RELATIVITY C, P109
[2]
LANDAU LD, 1971, CLASSICAL THEORY FIE, P292
[3]
MILNOR J, 1963, MORSE THEORY, P104
[4]
MISNER CW, 1973, GRAVITATION, P725
[5]
RYAN MP, 1975, HOMOGENEOUS RELATIVI, P48