共 8 条
[3]
Hughes D.R., 1959, PAC J MATH, V9, P1097
[4]
Hughes DR., 1957, B AM MATH SOC, V63, P209, DOI [10.1090/S0002-9904-1957-10108-6, DOI 10.1090/S0002-9904-1957-10108-6]
[5]
Kegel O.H., 1960, MATH Z, V75, P373
[6]
KHUKHRO EJ, 1987, ALGEBRA LOGIC, V26, P398
[7]
Thompson J, 1959, Proc Natl Acad Sci U S A, V45, P578, DOI 10.1073/pnas.45.4.578
[8]
WALL GE, 1967, 1965 P INT C THEOR G, P357