%0 Journal Article
%A A. Yu. Baryshnikov
%A A. B. Livchak
%T The languages ${\rm PQL}$ and ${\rm FO}+{\rm LFP}$ are equivalent even without the presence of order
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1996
%P 18-23
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1996_4_a2/
%G ru
%F IVM_1996_4_a2