%0 Journal Article %A Fabrici, Imrich %T One-Sided Bases of Semigroups %J Mathematica slovaca %D 1972 %P 286-290 %V 22 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1972__22_4_a4/ %G en %F MASLO_1972__22_4_a4