Dalir , Nemat and Nourazar , S. Salman. (2014). The Improved Modified Decomposition Method for the Treatment of Systems of Singular Nonlinear Partial Differential Equations with Initial Conditions.
            <i>Journal of Partial Differential Equations</i>. <i>27</i> (4).
            357-372.
         doi:10.4208/jpde.v27.n4.6