TAWFIQ, Luma N. M.; YASSIEN, Samaher M. Solution of High Order Ordinary Boundary Value Problems Using Semi-Analytic Technique. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 26, n. 1, p. 281–291, 2017. DOI: 10.30526/26.1.535. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/535. Acesso em: 29 mar. 2025.