Geodesic
Adjoining zero to ordered groupoid-semigroups
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (2003), pp. 28-35 
N. Kehayopulu; M. Tsingelis. Adjoining zero to ordered groupoid-semigroups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (2003), pp. 28-35. http://geodesic.mathdoc.fr/item/IVM_2003_9_a5/
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     author = {N. Kehayopulu and M. Tsingelis},
     title = {Adjoining zero to ordered groupoid-semigroups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {28--35},
     year = {2003},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2003_9_a5/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

[1] Birkhoff G., Lattice theory, Amer. Math. Soc. Coll. Publ., XXV, Providence, R.I, 1967

[2] Kehayopulu N., Tsingelis M., “On subdirectly irreducible ordered semigroups”, Semigroup Forum, 50 (1995), 161–177 | DOI | MR | Zbl

[3] Kehayopulu N., “On ordered semigroups without nilpotent ideal elements”, Math. Japonica, 36:2 (1991), 323–326 | MR | Zbl

[4] Kehayopulu N., Tsingelis M., “Characterizations of $0$-simple ordered semigroups”, Sci. Math., 3:2 (2000), 311–314 | MR

[5] Cao Yonglin, “Quotient principal factors of an ordered semigroup”, Comm. Algebra, 29:5 (2001), 1993–2001 | DOI | MR | Zbl

[6] Kehayopulu N., “On intra-regular ordered semigroups”, Semigroup Forum, 46 (1993), 271–278 | DOI | MR | Zbl