%0 Journal Article %A Daniel A. Romano %T On co-Filters in Semigroups with Apartness %J Kragujevac Journal of Mathematics %D 2021 %P 607 %V 45 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/KJM_2021_45_4_a7/ %G en %F KJM_2021_45_4_a7