%0 Journal Article %A I. I. Valutsè %T Left ideals of the semigroup of endomorphisms of a free universal algebra %J Doklady Akademii Nauk %D 1963 %P 235-237 %V 150 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1963_150_2_a1/ %G ru %F DAN_1963_150_2_a1