%0 Journal Article
%A I. A. Kipriyanov
%A L. A. Ivanov
%T On lacunae for some classes of equations with singularities
%J Sbornik. Mathematics
%D 1981
%P 217-230
%V 38
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1981_38_2_a3/
%G en
%F SM_1981_38_2_a3