Jiming Yang & Yanping Chen. (1970). A Priori Error Estimates of a Combined Mixed Finite Element and Discontinuous Galerkin Method for Compressible Miscible Displacement with Molecular Diffusion and Dispersion.
            <i>Journal of Computational Mathematics</i>. <i>29</i> (1).
            91-107.
         doi:10.4208/jcm.1006-m2991