@article{SF_1988__37_1_134926,
     author = {M. Satyanarayana},
     title = {Ordered semigroups containing minimal and maximal elements.},
     journal = {Semigroup forum},
     pages = {225--232},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {1988},
     zbl = {0639.06011},
     url = {http://geodesic.mathdoc.fr/item/SF_1988__37_1_134926/}
}