%0 Journal Article %A Fabrici, Imrich %T On Periodic Semigroups with One-Sided Identities %J Mathematica slovaca %D 1969 %P 145-148 %V 19 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1969__19_2_a10/ %G en %F MASLO_1969__19_2_a10