@article{SF_1990__40_1_135019,
     author = {M. Satyanarayana},
     title = {Ordered semigroups containing maximal elements.},
     journal = {Semigroup forum},
     pages = {195--204},
     year = {1990},
     volume = {40},
     number = {1},
     zbl = {0689.06012},
     url = {http://geodesic.mathdoc.fr/item/SF_1990__40_1_135019/}
}