A. K. Dutta, D. K. Basnet, K. D. Choudhury and S. R. Barbhuiya 2017. 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, 4 - B (Nov. 2017), 247–257.