Chinnadurai, V., S. Thayalan, and A. Bobin. “Some Operations of Complex Interval-Valued Pythagorean Fuzzy Set and Its Application”. Communications in Mathematics and Applications 12, no. 3 (September 30, 2021): 483–497. Accessed June 10, 2026. https://journals.rgnpublications.com/index.php/cma/article/view/1525.