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机译:
Islamic Azad Univ, Karaj Branch, Dept Comp Engn, Karaj, Iran;
Islamic Azad Univ, South Tehran Branch, Young Researchers & Elite Club, Tehran, Iran;
Shahed Univ, Dept Ind Engn, Fac Engn, Tehran, IranIslamic Azad Univ, Karaj Branch, Dept Ind Engn, Karaj, Iran;
IT outsourcing; group decision making model; interval-valued hesitant fuzzy sets theory; IT services providers;