%0 Journal Article %A Fabiana Çullhaj %A Anjeza Krakulli %T Some characterizations of regularity and intra-regularity of $\Gamma$-semigroups by means of quasi-ideals %J Novi Sad Journal of Mathematics %D 2021 %P 39 - 46 %V 51 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.30755/NSJOM.10795/ %R 10.30755/NSJOM.10795 %F 10.30755/NSJOM.10795