@article{SF_1992__44_1_135157,
     author = {N. Kehayopulu},
     title = {On prime, weakly prime ideals in ordered  semigroups.},
     journal = {Semigroup forum},
     pages = {341--346},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1992},
     zbl = {0756.06008},
     url = {http://geodesic.mathdoc.fr/item/SF_1992__44_1_135157/}
}