%0 Journal Article %A T. A. Martynova %T The largest groupoid of varieties of semigroups with zero %J Algebra i logika %D 1982 %P 251-268 %V 21 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1982_21_3_a0/ %G ru %F AL_1982_21_3_a0