1.
R. Azman RMN, M. Noor NA, Abdullah S, Ideris MM. Analysis of Drought Index in Sub-Urban Area Using Standard Precipitation Evapotranspiration Index (SPEI). IJIE. 2022;14(9):157-163. Accessed July 23, 2026. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/12822