Multilevel preconditioning on the refined interface and optimal boundary solvers for the Laplace equation. - Boris N. Khoromskij; Siegfried Prössdorf (Adv. Comput. Math., 1995)

Fast computations with the harmonic Poincaré-Steklov operators on nested refined meshes. - Boris N. Khoromskij; Siegfried Prössdorf (Adv. Comput. Math., 1998)

Multiwavelet approximation methods for pseudodifferential equations on curves. Stability and convergence analysis. - Siegfried Prössdorf; Jörg Schult (Adv. Comput. Math., 1998)