Fujita, Takaaki. “MetaFuzzy, MetaNeutrosophic, MetaSoft, and MetaRough Set”. Journal of Bangladesh Academy of Sciences 50, no. 1 (March 31, 2026): 107–145. Accessed April 3, 2026. https://www.banglajol.info/index.php/JBAS/article/view/84012.