共 7 条
[1]
Christoffel E. B., 1869, J REINE ANGEW MATH, V70, P46
[2]
EISENHART LP, 1927, NONRIEMANNIAN GEOMET, P14
[5]
[No title captured]
[6]
1928, ATTI C INT MATEMATIC, V1, P181
[7]
1928, P NATL ACAD SCI USA, V14, P135