Multigrid Algorithms for hp-Discontinuous Galerkin Discretizations of Elliptic Problems. - Paola F. Antonietti; Marco Sarti; Marco Verani (SIAM J. Numer. Anal., 2015)

A Uniform Additive Schwarz Preconditioner for High-Order Discontinuous Galerkin Approximations of Elliptic Problems. - Paola F. Antonietti; Marco Sarti; Marco Verani; Ludmil T. Zikatanov (J. Sci. Comput., 2017)