Ramesh, D, B Satyanarayana, and N Srimannarayana. “Direct Product of Finite Interval-Valued Intuitionistic Fuzzy Ideals in BF-Algebra”. International Journal of Engineering and Technology 7, no. 3.34 (September 1, 2018): 631–635. Accessed August 17, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/19404.