Tian , ZhikunChen , Yanping and Wang , Jianyun. (2018). Superconvergence Analysis of Bilinear Finite Element for the Nonlinear Schrödinger Equation on the Rectangular Mesh.
            <i>Advances in Applied Mathematics and Mechanics</i>. <i>10</i> (2).
            468-484.
         doi:10.4208/aamm.OA-2017-0156