%0 Journal Article
%A A. A. Vinogradov
%T Nonaxiomatizability of directionally ordered groups in the class of nontrivially partially ordered groups
%J Matematičeskie zametki
%D 1973
%P 395-397
%V 14
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1973_14_3_a9/
%G ru
%F MZM_1973_14_3_a9