%0 Journal Article %A E. A. Palyutin %T A supplement to Ju. L. Er\v{s}ov's article: ``The upper semilattice of %J Algebra i logika %D 1975 %P 284-287 %V 14 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1975_14_3_a2/ %G ru %F AL_1975_14_3_a2