TY  - JOUR
AU  - V. A. Gorbunov
TI  - Coverings in lattices of quasivarieties, and independent
JO  - Algebra i logika
PY  - 1977
SP  - 507
EP  - 548
VL  - 16
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1977_16_5_a1/
LA  - ru
ID  - AL_1977_16_5_a1
ER  -