Nghiem Van Tinh, Bui Thi Thi. Determining interval lengths for fuzzy time series forecasting model based on index of fuzzy sets by combining hedge algebra and particle swarm optimization. J. Mil. Sci. Technol. [Internet]. 2023 Dec. 10 [cited 2026 Mar. 12];(FEE):271-82. Available from: https://jmst.mod.gov.vn/index.php/jmst/article/view/1065