共 9 条
- [1] Byleen K., 1984, GLASGOW MATH J, V25, P153, DOI DOI 10.1017/S0017089500005565
- [2] Clifford A.H., 1967, ALGEBRAIC THEORY SEM
- [3] HALL TE, 1979, P S REGULAR SEMIGROU, P49
- [4] Howie J. M., 1976, INTRO SEMIGROUP THEO
- [5] JONES PR, ANALOGS BICYCLIC SEM
- [6] Lyndon R. C., 1977, COMBINATORIAL GROUP
- [7] MEGYESI L, 1981, STUD SCI MATH HUNG, V16, P437
- [8] NEUMANN BH, 1971, STUDIES PURE MATHEMA, P185
- [9] Preston GB, 1959, T AM MATH SOC, V93, P351