Deng , Dingwen and Li , Zhijun. (2024). Invariants-Preserving Du Fort-Frankel Schemes and Their Analyses for Nonlinear Schrödinger Equations with Wave Operator.
            <i>Journal of Computational Mathematics</i>. <i>42</i> (3).
            814-850.
         doi:10.4208/jcm.2211-m2021-0293