%0 Journal Article
%A S. G. Merzlyakov
%T Conditions for the range of a~difference operator to be closed
%J Izvestiya. Mathematics 
%D 1997
%P 593-618
%V 61
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1997_61_3_a4/
%G en
%F IM2_1997_61_3_a4