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APA4ort.xyz Knowledge Graph. (2026). NA Operator-Based Interval-Valued q-Rung Orthopair Fuzzy PSI-COPRAS Group Decision-Making Method. Retrieved May 24, 2026, from https://4ort.xyz/entity/na-operator-based-interval-valued-q-rung-orthopair-fuzzy-psi-copras-group-decision-making-method