Vivianti, Vivianti, and Aswi Aswi. “A Comparative Analysis of Interval Determination Using Sturges’ Rule and the Average-Based Method in Chen’s Fuzzy Time Series Model for Forecasting Indonesia’s CO_2 Emissions”. Jurnal MSA ( Matematika Dan Statistika Serta Aplikasinya), vol. 14, no. 2, Oct. 2026, pp. 235-47, doi:10.24252/msa.v14i2.66114.