%0 Journal Article
%A R. Kreß
%A W.T. Spassov
%T On the Condition Number of Boundary Integral Operators for the Exterior Dirichlet Problem for the Helmholtz Equation.
%J Numerische Mathematik
%D 1983
%P 77-96
%V 42
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1983__42_132862/
%F NUMA_1983__42_132862