%0 Journal Article %A N. G. Khisamiev %T Unsolvability of the elementary theory of a free lattice %J Algebra i logika %D 1967 %P 45-48 %V 6 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1967_6_5_a4/ %G ru %F AL_1967_6_5_a4