@article{SF_1993__47_2_135290,
     author = {N. Kehayopulu and M. Tsingelis},
     title = {On the decomposition of prime ideals of ordered semigroups into their {N-classes.}},
     journal = {Semigroup forum},
     pages = {393--395},
     publisher = {mathdoc},
     volume = {47},
     number = {2},
     year = {1993},
     zbl = {0782.06013},
     url = {http://geodesic.mathdoc.fr/item/SF_1993__47_2_135290/}
}