Tawfiq, Luma N. M., and Mariam M. Hilal. “Solution of 2nd Order Nonlinear Three-Point Boundary Value Problems By Semi-Analytic Technique”. Ibn AL-Haitham Journal For Pure and Applied Sciences, vol. 27, no. 3, Apr. 2017, pp. 501-12, https://jih.uobaghdad.edu.iq/index.php/j/article/view/315.