TY  - JOUR
AU  - A. A. Boyarkin
TI  - Relations for extensions in varieties of algebras
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1987
SP  - 229
EP  - 230
VL  - 42
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1987_42_6_a11/
LA  - en
ID  - RM_1987_42_6_a11
ER  -