Shi, Xiangyun, Yimeng Cao, and Xueyong Zhou. “Dynamics for a Stochastic Delayed SIRS Epidemic Model”. Nonlinear Analysis: Modelling and Control 25, no. 5 (September 1, 2020): 705–725. Accessed September 30, 2022. https://www.journals.vu.lt/nonlinear-analysis/article/view/17804.