Stability analysis of a nonlinear tumor–healthy–immune cell model under radiotherapy and chemotherapy . International Journal of Mathematical Research, [S. l.], v. 14, n. 1, p. 1–22, 2025. DOI: 10.18488/24.v14i1.4665. Disponível em: https://archive.conscientiabeam.com/index.php/24/article/view/4665. Acesso em: 5 aug. 2026.