共 17 条
[3]
BERGMANN PG, 1969, RIDDLE GRAVITATION
[5]
EISENHART LP, 1966, RIEMANNIAN GEOMETRY, P143
[7]
FLATO M, 1965, CR HEBD ACAD SCI, V260, P3532
[8]
GREENE R, 1970, MEM AM MATH SOC, V97, P1
[10]
ORAIFEARTAIGH L, 1965, PHYS LETT, V14, P757