ASIF, Muhammad; ISHTIAQ, Umar; ARGYROS, Ioannis K. Hamacher Aggregation Operators for Pythagorean Fuzzy Set and its Application in Multi-Attribute Decision-Making Problem. Spectrum of Operational Research, [S. l.], v. 2, n. 1, p. 27–40, 2025. DOI: 10.31181/sor2120258. Disponível em: https://sor-journal.org/index.php/sor/article/view/8. Acesso em: 26 jan. 2026.