Vianita, Etna, Redemtus Heru Tjahjana, and Titi Udjiani. “Fuzzy Time Series Orde Tinggi Berdasarkan Rasio Interval”. Jurnal Matematika UNAND 11, no. 1 (April 7, 2022): 53–63. Accessed November 4, 2026. https://jmua.fmipa.unand.ac.id/index.php/jmua/article/view/865.