On numerical cubatures of singular surface integrals in boundary element methods. W.L. Wendland; C. Schwab — 1992 Numerische Mathematik
Adaptive Boundary Element Methods for Strongly Elliptic Integral Equations. W.L. Wendland; De-hao Yu — 1988 Numerische Mathematik
The Convergence of Spline Collocation for Strongly Elliptic Equations on Curves. Douglas N. Arnold; W.L. Wendland — 1985 Numerische Mathematik
Strong ellipticity of boundary integral operators. M., Wendland, W.L. Costabel — 1986 Journal für die reine und angewandte Mathematik