%0 Journal Article %A Ya. L. Mordvinov %T On varieties with a semilattice countable skeleton of %J Algebra i logika %D 1993 %P 288-307 %V 32 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1993_32_3_a4/ %G ru %F AL_1993_32_3_a4