Suryatin, Evatia, et al. “Hybrid ARIMA Modeling With Stochastic Volatility for Forecasting the Value of Non-Oil and Gas Exports in Indonesia”. (IJCSAM) International Journal of Computing Science and Applied Mathematics, vol. 10, no. 1, Mar. 2024, pp. 27-33, https://journal.its.ac.id/index.php/ijcsam/article/view/4627.