MAHMOUD, S. .; EHSSAN, S. . . Approximate Solutions of Twelfth-Order Boundary Value Problems by Using Spline Technique. Latakia University Journal -Basic Sciences Series, [S. l.], v. 39, n. 5, 2018. Disponível em: https://journal.tishreen.edu.sy/index.php/bassnc/article/view/4003. Acesso em: 30 jan. 2025.