علي ك. .; سليمان محمود. The Combined Sumudu Transform and New Homotopy Perturbation Methods for Stiff Systems of Differential Equations. Latakia University Journal -Basic Sciences Series, [S. l.], v. 44, n. 3, p. 167–182, 2022. Disponível em: https://journal.latakia-univ.edu.sy/index.php/bassnc/article/view/11739. Acesso em: 26 jul. 2025.