%0 Journal Article
%A G. M. Kagan
%T On a class of singular problems satisfying Huygens principle
%J Doklady Akademii Nauk
%D 1981
%P 1307-1311
%V 256
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1981_256_6_a5/
%G ru
%F DAN_1981_256_6_a5