Maslahatul Khaerat, Muhammad Fahmuddin S, and Z. Mar’ah. “Comparison of Methods Fuzzy Time Series Chen And Fuzzy Time Series Cheng On the Closing Price Forecast of PT Bank Central Asia Tbk (BBCA) Shares”. VARIANSI: Journal of Statistics and Its Application on Teaching and Research, Vol. 8, no. 02, Oct. 2026, pp. 221-36, doi:10.35580/variansiunm531.