TY  - JOUR
AU  - P. E. Alaev
TI  - Structures computable in polynomial time.~I
JO  - Algebra i logika
PY  - 2016
SP  - 647
EP  - 669
VL  - 55
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_2016_55_6_a0/
LA  - ru
ID  - AL_2016_55_6_a0
ER  -