Weakly Imposed Symmetry and Robust Preconditioners for Biot's Consolidation Model. - Trygve Bærland; Jeonghun J. Lee; Kent-André Mardal; Ragnar Winther (Comput. Methods Appl. Math., 2017)

An Auxiliary Space Preconditioner for Fractional Laplacian of Negative Order. - Trygve Bærland (CoRR, 2019)

Multigrid Methods for Discrete Fractional Sobolev Spaces. - Trygve Bærland; Miroslav Kuchta; Kent-André Mardal (SIAM J. Sci. Comput., 2019)