Voir la notice de l'article provenant de la source Hellenic Digital Mathematics Library
@article{EUG_1993__38_a17, author = {Niovi Kehayopulu and Michael Tsingelis}, title = {The {Ideal} extensions of ordered semigroups}, journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma} }, pages = {89-93}, publisher = {mathdoc}, volume = {38}, year = {1993}, language = {gr}, url = {http://geodesic.mathdoc.fr/item/EUG_1993__38_a17/} }
Niovi Kehayopulu; Michael Tsingelis. The Ideal extensions of ordered semigroups. Ευκλείδης Γ , Tome 38 (1993), p. 89-93. http://geodesic.mathdoc.fr/item/EUG_1993__38_a17/