Analysis and investigation of complex network immunity waning and two strain dynamical system. Journal of Mathematical Modeling and Fractional Calculus, [S. l.], v. 3, n. 1, p. 148–168, 2026. DOI: 10.48165/jmmfc.2026.3108. Disponível em: https://www.acspublisher.com/journals/index.php/jmmfc/article/view/24489. Acesso em: 18 jul. 2026.