Feng, Yuming, Qingsong Zeng, and Huiling Duan. “ON (λ, µ)-FUZZY SUBHYPERLATTICES”. Italian Journal of Pure and Applied Mathematics 30 (May 24, 2013): 79–86. Accessed July 26, 2026. https://journals.uniurb.it/index.php/ijpam/article/view/6114.