Least Square Method For Solving The Nonlinear Delay Fourth Order Eigenvalue Problems Consists Delay Ordinary Differential Equations. Journal of the College of Basic Education, [S. l.], v. 27, n. 111, p. 507–514, 2022. DOI: 10.35950/cbej.v27i111.5251. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/5251.. Acesso em: 8 jul. 2025.