Ajmia Younes Orfi & Driss Yakoubi. (2020). A Priori Error Analysis of an Euler Implicit, Finite Element Approximation of the Unsteady Darcy Problem in an Axisymmetric Domain.
            <i>Advances in Applied Mathematics and Mechanics</i>. <i>10</i> (2).
            301-321.
         doi:10.4208/aamm.OA-2016-0055