%0 Journal Article %A X.-Yu. Xie %A F. Yan %T Fuzzy ideals extenstions of ordered semigroups %J Lobachevskii journal of mathematics %D 2005 %P 29-40 %V 19 %I mathdoc %U http://geodesic.mathdoc.fr/item/LJM_2005_19_a2/ %G en %F LJM_2005_19_a2