共 5 条
[2]
Porteous IR., 1969, TOPOLOGICAL GEOMETRY
[3]
RAWNSLEY JH, 1974, P CAMB PHILOS SOC, V76, P473
[4]
STROM S, 1971, LECTURES THEORETICAL, V13
[5]
TAKAHASHI R, 1963, B SOC MATH FRANCE, V91, P289