%0 Journal Article %A A. A. Gaifullin %T On an extension of the Birman--Craggs--Johnson homomorphism %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2017 %P 1171-1173 %V 72 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_2017_72_6_a6/ %G en %F RM_2017_72_6_a6