L. Qadrini, A. Asrirawan, N. . Mahmudah, M. . . . Fahmuddin, and I. F. . Amri, “Forecasting Bank Indonesia Currency Inflow and Outflow Using ARIMA, Time Series Regression (TSR), ARIMAX, and NN Approaches in Lampung ”, J, vol. 17, no. 2, pp. 166-177, Dec. 2020.