Roh, Eun Hwan, Eunsuk Yang, and Young Bae Jun. “Intuitionistic Fuzzy Ordered Subalgebras in Ordered BCI-Algebras”. European Journal of Pure and Applied Mathematics 16, no. 3 (July 30, 2023): 1342–1358. Accessed November 29, 2023. https://ejpam.com/index.php/ejpam/article/view/4832.