Li , AngYang , HongtaoLi , Yonghai and Yuan , Guangwei. (2023). The Corrected Finite Volume Element Methods for Diffusion Equations Satisfying Discrete Extremum Principle.
            <i>Communications in Computational Physics</i>. <i>32</i> (5).
            1437-1473.
         doi:10.4208/cicp.OA-2022-0130