Upadhyay, Ranjit Kumar, and Sattwika Acharya. “Modeling the Recent Outbreak of COVID-19 in India and Its Control Strategies”. Nonlinear Analysis: Modelling and Control 27, no. 2 (March 1, 2022): 254–274. Accessed July 18, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/25197.