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), pp. 7–13. doi: 10.65418/ajapas.v4i3.1295.