A. K. Dutta, D. K. Basnet, K. D. Choudhury, and S. R. Barbhuiya. “Direct Product of General Doubt Intuitionistic Fuzzy Ideals of $BCK/BCI$-Algebras With Respect to Triangular Binorm”. International Journal of Mathematics And its Applications 5, no. 4 - B (November 1, 2017): 247–257. Accessed July 22, 2024. https://ijmaa.in/index.php/ijmaa/article/view/1263.