Geng , XianguoChen , Mingming and Wang , Kedong. (2020). Application of the Nonlinear Steepest Descent Method to the Coupled Sasa-Satsuma Equation.
            <i>East Asian Journal on Applied Mathematics</i>. <i>11</i> (1).
            181-206.
         doi:10.4208/eajam.220920.250920