Fujita, Takaaki. “The Hyperfuzzy VIKOR and Hyperfuzzy DEMATEL Methods for Multi-Criteria Decision-Making”. Spectrum of Decision Making and Applications 3, no. 1 (June 17, 2025): 292–315. Accessed December 11, 2025. https://dmap-journal.org/index.php/dmap/article/view/54.