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• Tayebnasab.Seyyedeh Farkhondeh A New Method for Solving the Fully Interval Bilevel Linear Programming Problem with Equal Constraints [ Vol.4, Issue 2 - Summer Year 1397]
• Tohidi.Ghasem A new non oriented models for calculating the efficiency of decision-making units in the presence of flexible variables [ Vol.4, Issue 3 - Autumn Year 1397]