Li , Xinshu and Fu , Kai. (2022). Positive and Conservative Characteristic Block-Centered Finite Difference Methods for Convection Dominated Diffusion Equations.
            <i>Advances in Applied Mathematics and Mechanics</i>. <i>14</i> (5).
            1087-1110.
         doi:10.4208/aamm.OA-2021-0051