R. K. Mohanty and Nikita Setia. (2018). A New Fourth-Order Compact Off-Step Discretization for the System of 2D Nonlinear Elliptic Partial Differential Equations.
            <i>East Asian Journal on Applied Mathematics</i>. <i>2</i> (1).
            59-82.
         doi:10.4208/eajam.291211.080212a