Andreas Hiltebrand and Siddhartha Mishra. (2018). Efficient Preconditioners for a Shock Capturing Space-Time Discontinuous Galerkin Method for Systems of Conservation Laws.
            <i>Communications in Computational Physics</i>. <i>17</i> (5).
            1320-1359.
         doi:10.4208/cicp.140214.271114a