TY  - JOUR
AU  - A. I. Budkin
TI  - Quasivarieties of groups having no coverings
JO  - Matematičeskie zametki
PY  - 1985
SP  - 609
EP  - 616
VL  - 37
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1985_37_5_a0/
LA  - ru
ID  - MZM_1985_37_5_a0
ER  -