TY  - JOUR
AU  - L. P. Lisovik
TI  - $\Sigma TC$-generated languages and relative equivalence problems
JO  - Diskretnaya Matematika
PY  - 1997
SP  - 139
EP  - 160
VL  - 9
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DM_1997_9_2_a14/
LA  - ru
ID  - DM_1997_9_2_a14
ER  -