TY - RPRT TI - Efficient discontinuous Galerkin implementations and preconditioners for implicit unsteady compressible flow simulations AU - Franciolini, Matteo AU - Fidkowski, Krzysztof J. AU - Crivellini, Andrea PY - 2020 DO - 10.1016/j.compfluid.2020.104542 UR - https://www.osti.gov/biblio/1802092 ID - 1802092 ER -