Marynirmala, J., and D. Sivakumar. “Pythagorean Fuzzy Strong Bi-Ideal and Direct Product of Pythagorean Fuzzy Ideals in Near Ring”. Communications in Mathematics and Applications 12, no. 4 (December 13, 2021): 1079–1100. Accessed April 24, 2024. http://www.rgnpublications.com/journals/index.php/cma/article/view/1596.