共 6 条
[1]
ALEXANDROFF P, 1935, TOPOLOGIE, P549
[2]
COURANT R, 1945, CALCULUS VARIATIONS, V3, P12
[3]
EISENHART LP, 1949, RIEMANNIAN GEOMETRY, P50
[4]
EISENHART LP, 1947, INTRO DIFFERENTIAL G, P161
[5]
HUREWICZ W, 1935, P AKAD WETENSCHAP AM, V38, P118