A.S, Hadisuwito, and Hassan F.H. “Selection Drought Index Calculation Methods Using Electre, Topsis, and Analytic Hierarchy Process”. International Journal of Engineering & Technology 7, no. 4.36 (December 9, 2018): 1413–1418. Accessed May 2, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/28997.