1. Arnold D.N. and Wendland W.L. (1983), On the Asymptotic Convergence of Collocation Methods, Math. Comp. 41, pp. 349–381.
2. Arnold D.N. and Wendland W.L. (1985), The Convergence of Spline Collocation for Strongly Elliptic Equations on Curves, Numer. Math. 47, pp. 317–341.
3. Christiansen S. and Hougaard P. (1978), An Investigation of a Pair of Integral Equations for the Biharmonic Problem, J. Inst. Math. Appl. 22, pp. 15–27.
4. Costabel M., Lusikka I. and Saranen J., Comparison of Three Boundary Element Approaches for the Solution of the Clamped Plate Problem, Boundary Elements IX. 2. Southampton, 1987, pp. 19–34.
5. Costabel M., Stephan E. and Wendland W.L. (1983), On Boundary Integral Equations of the First Kind for the Bi-Laplacian in a Polygonal Plane Domain, Ann. Scuola Norm. Sup. Pisa, CI. Sci. (4), 10, pp. 197–241.