%0 Journal Article %A I. L. Mel'nichuk %T Undecidability of the problems of equality and divisibility in %J Algebra i logika %D 1984 %P 430-438 %V 23 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1984_23_4_a5/ %G ru %F AL_1984_23_4_a5