ON LEFT REGULAR AND LEFT DUO POE-SEMIGROUPS

[1] BIRKHOFF G, 1967, AM MATH SOC C PUBL, V25

[2] Clifford A.H., 1964, ALGEBRAIC THEORY SEM, V1, P7

[3] INTRA-REGULAR VE-SEMIGROUPS [J]. SEMIGROUP FORUM, 1980, 19 (02) : 111 - 121

[4] KEHAYOPULU N, 1987, SEMIGROUP FORUM, V34, P367

[5] ON LEFT (RESP RIGHT) DUO REGULAR POE-SEMIGROUPS [J]. SEMIGROUP FORUM, 1985, 31 (01) : 123 - 125

[6] Kehayopulu N., 1990, MATH JAPON, V35, P1061

[7] Petrich M., 1973, INTRO SEMIGROUPS

[1] BIRKHOFF G, 1967, AM MATH SOC C PUBL, V25

[2] Clifford A.H., 1964, ALGEBRAIC THEORY SEM, V1, P7

[3] INTRA-REGULAR VE-SEMIGROUPS [J]. SEMIGROUP FORUM, 1980, 19 (02) : 111 - 121

[4] KEHAYOPULU N, 1987, SEMIGROUP FORUM, V34, P367

[5] ON LEFT (RESP RIGHT) DUO REGULAR POE-SEMIGROUPS [J]. SEMIGROUP FORUM, 1985, 31 (01) : 123 - 125

[6] Kehayopulu N., 1990, MATH JAPON, V35, P1061

[7] Petrich M., 1973, INTRO SEMIGROUPS