Ji , LijieChen , Yanlai and Xu , Zhenli. (2019). A Reduced Basis Method for the Nonlinear Poisson-Boltzmann Equation.
            <i>Advances in Applied Mathematics and Mechanics</i>. <i>11</i> (5).
            1200-1218.
         doi:10.4208/aamm.OA-2018-0188