1. The normal derivative of the double layer potential on a polygon and Galerkin approximations;Costabel;Applicable Analysis,1983
2. Boundary integral equations for mixed boundary value problems in polygonal domain and Galerkin approximations, Mathematical models and methods in mechanics, 1981;Costabel;Banach Center Publications 15,1985
3. On the convergence of the p-version of the boundary element Galerkin method;Stephan;Math. Comp.,1989
4. E.P. Stephan and M. Suri, The h-p version of the boundary element method on polygon domains with quasiuniform meshes, to appear.
5. I. Babuška, B.Q. Guo and E.P. Stephan, On the exponential convergence of the h-p version of the boundary element Galerkin method on polygons, to appear.