Delay Differential Equations Modelling and Stability of Tumor Growth with Immune Responses. Pi International Journal of Mathematical Sciences, [S. l.], v. 2, n. 1, p. 1–8, 2026. DOI: 10.59828/pijms.v2i1.21. Disponível em: https://pijms.com/index.php/pijms/article/view/21. Acesso em: 20 feb. 2026.