@article{MAN_1966__167_161473,
     author = {K. L. N. Swamy},
     title = {Dually {Residuated} {Lattice} {Ordered} {Semigroups,} {III}},
     journal = {Mathematische Annalen},
     pages = {71--74},
     publisher = {mathdoc},
     volume = {167},
     year = {1966},
     zbl = {0158.02601},
     url = {http://geodesic.mathdoc.fr/item/MAN_1966__167_161473/}
}