A. Taha, Bushra, and Abdulhassan J. Kadhim. 2018. “Non-Polynomial Spline Finite Difference Method for Solving Second Order Boundary Value Problem”. Journal of Al-Qadisiyah for Computer Science and Mathematics 10 (2):Math Page 92 - 101. https://doi.org/10.29304/jqcm.2018.10.2.384.