共 8 条
[2]
Burgess WD, 1980, GLASGOW MATH J, V21, P29, DOI 10.1017/S0017089500003955
[3]
BURGESS WD, 1985, GLASGOW MATH J, V26, P157
[4]
CLIFFORD AH, MATH SURVEYS, V7
[5]
SCHEIN BM, 1973, CZECH MATH J, V23, P575
[6]
SCHEIN BM, 1976, NOTICES AM MATH SOC, V23
[7]
SCHEIN BM, 1976, C MATH SOC JANOS BOL, V20, P519
[8]
SHOJI K, 1979, 3RD P S SEM, P69