Feriyanto, Erikha, Farikhin Farikhin, and Nikken Prima Puspita. “Singh’s Fuzzy Time Series Forecasting Modification Based on Interval Ratio”. Jurnal sosial dan sains 4, no. 3 (March 28, 2024): 255–264. Accessed September 8, 2024. https://sosains.greenvest.co.id/index.php/sosains/article/view/1248.