共 25 条
[2]
ABERG H, 1986, P LOND MATH SOC, V52, P269
[4]
BIERI R, 1974, COMMENT MATH HELV, V49, P74, DOI 10.1007/BF02566720
[8]
Brown KS, 1982, GRADUATE TEXTS MATH
[9]
DYDAK J, 1977, B ACAD POL SCI SMAP, V25, P55
[10]
Dydak J., 1977, B POLON ACAD SCI MAP, V25, P485