Tawfiq LNM, Yassien SM. Solution of High Order Ordinary Boundary Value Problems Using Semi-Analytic Technique. IHJPAS [Internet]. 2017 Apr. 30 [cited 2025 Mar. 30];26(1):281-9. Available from: https://jih.uobaghdad.edu.iq/index.php/j/article/view/535