참고문헌
- Comm. Math. Soc. v.11 no.2 On left, right weakly prime ideals on po-semigroups S. K. Lee;Y. I. Kwon
- Math. Japon. On characterizations of some classes of po-semigroups, to appear in S. K. Lee
- Math. Japon. v.37 On completely regular poe-semigroups N. Kehayopulu
- Semigroup Forum v.19 On intra-regular V e-semigroups N. Kehayopulu
- Math. Japon. v.35 On left regular ordered semigroups N. Kehayopulu
- Math. Japon. v.36 On right regular and right duo ordered semigroups N. Kehayopulu
- Math. Japon. v.35 On weakly prime ideals of ordered semigroups N. Kehayopulu
- Semigroup Forum v.46 On intra-regular ordered semigroups N. Kehayopulu