Yusuf, B. and Shabri, A. 2025. Enhancing Drought Forecasting Accuracy: A Wavelet-ARIMA Modelling Approach for Standardized Precipitation Index Data. MATEMATIKA. 41, 3 (Nov. 2025), 283–308. DOI:https://doi.org/10.11113/matematika.v41.n3.1671.