J. Akter & M. Ali  Akbar. (2019). Solitary Wave Solutions to the ZKBBM Equation and the KPBBM Equation Via the Modified Simple Equation Method.
            <i>Journal of Partial Differential Equations</i>. <i>29</i> (2).
            143-160.
         doi:10.4208/jpde.v29.n2.5