@article{GDZPPN002296977, title = {Dually Residuated Lattice Ordered Semigroups, III}, journal = {Mathematische Annalen}, volume = {163}, year = {1966}, pages = {71-74}, zbl = {0158.02601}, url = {http://dml.mathdoc.fr/item/GDZPPN002296977} }
Swamy, K. L. N. Dually Residuated Lattice Ordered Semigroups, III. Mathematische Annalen, Tome 163 (1966) pp. 71-74. http://gdmltest.u-ga.fr/item/GDZPPN002296977/