%0 Journal Article %A S. V. Pchelintsev %T Nilpotency of the associators in a free $(-1,\,1)$-ring %J Algebra i logika %D 1974 %P 217-223 %V 13 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1974_13_2_a6/ %G ru %F AL_1974_13_2_a6