M. SALMAN, Israa; A. ABDUL-RAZZAQ, Eman. Solving Nonlinear Second Order Delay Eigenvalue Problems by Least Square Method. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 33, n. 4, p. 59–64, 2020. DOI: 10.30526/33.4.2509. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/2509. Acesso em: 28 mar. 2025.