%0 Journal Article
%A M. S. Agranovich
%A R. Mennicken
%T Spectral boundary value problems for the~Helmholtz equation with spectral parameter in~boundary conditions on a~non-smooth surface
%J Sbornik. Mathematics
%D 1999
%P 29-69
%V 190
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1999_190_1_a1/
%G en
%F SM_1999_190_1_a1