Pythagorean Fuzzy-AHP (PF-AHP) Approach for Emerging New Risk Evaluation in China-West Africa Digital Trade Collaboration. - Mohammed Gadafi Tamimu; Shurong Zhao; Qianwen Xu 004; Jie Zhang; Xinyi Yin (J. Theor. Appl. Electron. Commer. Res., 2025)