RESOLVING DELAY DIFFERENTIAL EQUATIONS WITH HOMOTOPY PERTURBATION AND SUMUDU TRANSFORM . Jurnal Teknologi (Sciences & Engineering), [S. l.], v. 85, n. 3, p. 145–151, 2023. DOI: 10.11113/jurnalteknologi.v85.18937. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/18937.. Acesso em: 22 nov. 2024.