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机译:Decision Optimization of Four-Level Supply Chain with the Participation of Two-Echelon Logistics Service Providers under Different Power Structures
Inner Mongolia Agr Univ, Sch Econ & Management, Hohhot 010010, Peoples R China;
Zhengzhou Univ Aeronaut, Sch Management & Engn, Zhengzhou 450046, Peoples R China;