Multigrid based preconditioners for the numerical solution of two-dimensional heterogeneous problems in geophysics. - Lothar Reichel; Hassane Sadok; Andriy Shyshkov (Int. J. Comput. Math., 2007)

Cascadic Multiresolution Methods for Image Deblurring. - Serena Morigi; Lothar Reichel; Fiorella Sgallari; Andriy Shyshkov (SIAM J. Imaging Sci., 2008)

Cascadic multilevel methods for ill-posed problems. - Lothar Reichel; Andriy Shyshkov (J. Comput. Appl. Math., 2010)