Yüksel, Serhat, Fatih Karaman, Serkan Eti, Hasan Dinçer, and Edanur Ergün. 2026. “Strategic Procurement Prioritization for Sustainable Aviation Fuel: An Integrated Pythagorean Fuzzy SWARA–RAM Decision Support Framework”. Spectrum of Engineering and Management Sciences 4 (1): 255-80. https://doi.org/10.31181/sems41202692.