1. Ainsworth, M., Guo, B.: An additive Schwarz preconditioner for p-version boundary element approximation of the hypersingular operator in three dimensions. Numer. Math. 85(3), 343–366 (2000)
2. Bică, I.: Iterative Substructuring Algorithms for the p-version Finite Element Method for elliptic Problems. PhD thesis, Courant Institute of Mathematical Sciences, New York University (1997)
3. Bramble, J.H., Pasciak, J.E.: New estimates for multilevel algorithms including the V-cycle. Math. Comp. 60(202), 447–471 (1993)
4. Heuer, N.: Efficient algorithms for the p-version of the boundary element method. J. Integral Equations Appl. 8(3), 337–361 (1996)
5. Heuer, N.: Preconditioners for the p-version of the boundary element Galerkin method in ℝ3. Habilitation thesis, Inst. Angew. Mathematik, Universität Hannover. (1998)