A.S, Hadisuwito, and Hassan F.H. “Selection Drought Index Calculation Methods Using Electre, Topsis, and Analytic Hierarchy Process”. International Journal of Engineering and Technology 7, no. 4.36 (March 2, 2026): 1413–1418. Accessed March 29, 2026. https://www.sciencepubco.com/index.php/IJET/article/view/28997.