Al Salem، A. S.، و Troutt، M. (1993). DEVELOPMENT AND TESTING OF FAIRNESS CONDITIONS AND IMPORTANCE WEIGHTS TO MEASURE THE DECISIONAL EFFICIENCY OF OPEC MEMBER COUNTRIES (رسالة دكتوراه غير منشورة). Southern Illinois University، كاربونديل. مسترجع من http://search.mandumah.com/Record/614250
Al Salem، Ahmad Saleh، و Marvin Troutt. "DEVELOPMENT AND TESTING OF FAIRNESS CONDITIONS AND IMPORTANCE WEIGHTS TO MEASURE THE DECISIONAL EFFICIENCY OF OPEC MEMBER COUNTRIES" رسالة دكتوراه. Southern Illinois University، كاربونديل، 1993. مسترجع من http://search.mandumah.com/Record/614250