Wanduku, Divine, and B.O. Oluyede. “Some Asymptotic Properties of SEIRS Models With Nonlinear Incidence and Random Delays”. Nonlinear Analysis: Modelling and Control 25, no. 3 (May 1, 2020): 461–481. Accessed June 1, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/16660.