%0 Journal Article %A L. P. Lisovik %T Quasirelations in a free group and problems of the equivalence %J Algebra i logika %D 1986 %P 51-86 %V 25 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1986_25_1_a1/ %G ru %F AL_1986_25_1_a1