共 8 条
- [2] ALEXANDROFF P, TOPOLOGIE, P440
- [3] Borsuk K., 1934, MONATSH MATH PHYS, V41, P64
- [4] HOPF H, 1941, COMM MATH HELV, V14, P304
- [5] HUREWICZ W, 1936, TOPOLOGIE DEFORMATIO, V39, P124
- [6] van Kampen ER, 1933, AM J MATH, V55, P261
- [7] Whitehead JHC, 1939, P LOND MATH SOC, V45, P243
- [8] [No title captured]