Li , ChangfengYuan , YirangCheng , Aijie and Song , Huailing. (2022). A Conservative Upwind Approximation on Block-Centered Difference for Chemical Oil Recovery Displacement Problem.
            <i>Advances in Applied Mathematics and Mechanics</i>. <i>14</i> (6).
            1246-1275.
         doi:10.4208/aamm.OA-2021-0284