R. K. . Joshi, S. Bhatt, T. R. Lamichhane, and M. P. Ghimire, “Analysis of second wave of COVID-19 cases in Nepal with a logistic model”, Asian J Med Sci, vol. 12, no. 10, pp. 20–26, Oct. 2021, doi: 10.3126/ajms.v12i10.38763.