共 15 条
[2]
Alexandroff P., 1935, TOPOLOGIE, P3
[3]
Banach S., 1932, THEORIE OPERATIONS L
[4]
COURANT R, 1931, METHODEN MATH PHYSIK, V1
[9]
Leray J., 1934, ANN SCI ECOLE NORM S, V51, P45
[10]
LUSTERNIK L, 1939, B ACADEMIE SCI URS M, V3, P257