共 16 条
[5]
FREUDENTHAL H, 1937, KON AK WET AMSTERDAM, V40, P54
[6]
Hopf H, 1930, J REINE ANGEW MATH, V163, P71
[7]
HOPF PAH, 1936, TOPOLOGIE 1
[8]
KOLMOGOROFF A, 1936, RECUEIL MATH MOSCOW, V1, P701
[9]
KOLMOGOROFF A, 1936, RECUEIL MATH MOSCOW, V1, P97
[10]
Lefschetz S., 1937, B AM MATH SOC, V43, DOI DOI 10.1090/S0002-9904-1937-06544-X