Nurul Faqiyyatur Rokhmah, et al. “Multi Criteria Decision Making Menggunakan Operator Group Generalized Interval Value Pythagorean Fuzzy”. Limits: Journal of Mathematics and Its Applications, vol. 18, no. 2, Nov. 2021, pp. 187-02, https://journal.its.ac.id/index.php/limits/article/view/5300.