Zhang , HongQian , XuXia , Jun and Song , Songhe. (2023). Unconditionally Maximum-Principle-Preserving Parametric Integrating Factor Two-Step Runge-Kutta Schemes for Parabolic Sine-Gordon Equations.
            <i>CSIAM Transactions on Applied Mathematics</i>. <i>4</i> (1).
            177-224.
         doi:10.4208/csiam-am.SO-2022-0019