Jayadri, B. L., and A. M. Abadi. “Fuzzy Logic Application for Drought Risk Determination in Kulon Progo Regency, Daerah Istimewa Yogyakarta Province, Indonesia”. EKSAKTA: Journal of Sciences and Data Analysis, vol. 2, no. 1, June 2021, pp. 62-75, doi:10.20885/EKSAKTA.vol2.iss1.art9.