TY  - JOUR
AU  - A. Yu. Baryshnikov
AU  - A. B. Livchak
TI  - The languages ${\rm PQL}$ and ${\rm FO}+{\rm LFP}$ are equivalent even without the presence of order
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1996
SP  - 18
EP  - 23
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1996_4_a2/
LA  - ru
ID  - IVM_1996_4_a2
ER  -