TY  - JOUR
AU  - L. A. Shemetkov
TI  - The product of formations of algebraic systems
JO  - Algebra i logika
PY  - 1984
SP  - 721
EP  - 729
VL  - 23
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1984_23_6_a6/
LA  - ru
ID  - AL_1984_23_6_a6
ER  -