Takaaki Fujita, Florentin Smarandache. Directed n-Superhypergraphs Incorporating Bipolar Fuzzy Information: A Multi-Tier Framework for Modeling Bipolar Uncertainty in Complex Networks. Neutrosophic Sets Syst. [Internet]. 2025 Sep. 15 [cited 2026 Mar. 14];88:164-83. Available from: https://fs.unm.edu/nss8/index.php/111/article/view/6638