%0 Journal Article
%A M. B. Abrosimov
%A A. A. Dolgov
%T On directed acyclic exact extensions
%J Izvestiya of Saratov University. Mathematics. Mechanics. Informatics
%D 2010
%P 83-88
%V 10
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ISU_2010_10_1_a13/
%G ru
%F ISU_2010_10_1_a13