M. D. P. Martinasari, K. P. Romantica, and P. T. D. Gentari, “MODELING AND FORECASTING MORTALITY RATES DURING THE COVID-19 PANDEMIC USING THE SECOND ADAPTED NOLFI MODEL AND AUTO ARIMA”, BAREKENG: J. Math. & App., vol. 20, no. 1, pp. 0603-0618, Nov. 2025.