共 45 条
[1]
ATKINSON FV, 1955, PAC J MATH, V5, P643
[3]
Belohorec S., 1961, MAT FYZ CASOPIS SLOV, V11, P250
[6]
BUTLER GJ, 1979, P AM MATH SOC, V76, P159
[7]
Coles W.J., 1968, ANN MAT PUR APPL, V79, P391
[8]
COPPEL WA, 1971, LECTURE NOTES MATH, V220
[10]
ERBE L, 1972, ANN MAT PUR APPL, V94, P257