[1]
S. M. Al-Mekhlafi, A. Boudaoui, N. Laksaci, T. Abdeljawad, and B. Abdalla, “Modeling Dengue-COVID-19 Co-Epidemics via Crossover Discrete Time Systems with Variable-Order Fractional Memory”, Contemp. Math., vol. 7, no. 4, pp. 4111–4162, Jul. 2026.