TY  - JOUR
AU  - V. Yu. Popov
TI  - On positive theories of semigroup varieties and pseudovarieties
JO  - Fundamentalʹnaâ i prikladnaâ matematika
PY  - 2002
SP  - 631
EP  - 635
VL  - 8
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FPM_2002_8_2_a17/
LA  - ru
ID  - FPM_2002_8_2_a17
ER  -