TY  - JOUR
AU  - A. M. Nurakunov
TI  - Quasivarieties of algebras with definable principal
JO  - Algebra i logika
PY  - 1990
SP  - 35
EP  - 46
VL  - 29
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1990_29_1_a3/
LA  - ru
ID  - AL_1990_29_1_a3
ER  -