%0 Journal Article
%A V. V. Shan'kov
%T Difference operators with variable step
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1987
%P 229-230
%V 180
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1987_180_a141/
%G ru
%F TM_1987_180_a141