Orapine, H. O., A. A. Baidu, and I. M. Kwaghkor. “The Cauchy Problem for Nonlinear Higher Order Partial Differential Equations Using Projected Differential Transform Method”. International Journal of Mathematical Sciences and Optimization: Theory and Applications, Vol. 9, no. 2, Nov. 2023, pp. 74 -89, http://ijmso.unilag.edu.ng/article/view/1981.