Sucipto, C. S., Sulandari, W., & Susanti, Y. (2025). IMPLEMENTATION OF CROSS-VALIDATION ON HANG SENG INDEX FORECASTING USING HOLT’S EXPONENTIAL SMOOTHING AND AUTO-ARIMA METHOD. BAREKENG: Jurnal Ilmu Matematika Dan Terapan, 19(1), 13-24. https://doi.org/10.30598/barekengvol19iss1pp13-24