Huda Farg Alspihe and Hala Ail Shelo 2025. Least Square Method for Solving Second-Order Eigenvalue Problems with Nonlinear Delay Involves Ordinary Differential Equations with Nonlinear Delay . African Journal of Advanced Pure and Applied Sciences . 4, 3 (Jul. 2025), 7–13. DOI:https://doi.org/10.65418/ajapas.v4i3.1295.