List of Articles assurance region Open Access Article Abstract Page Full-Text 1 - Evaluation and Selection of a Supplier by Interval DEA Models with Assurance Region: ADEA Approach to Efficient and Inefficient Frontiers Hossein Azizi Akbar Jafari Shaerlar Open Access Article Abstract Page Full-Text 2 - The Minimal Cost – Benefit Ratio for Interval Data Sahand Daneshvar Mozhgan Mansouri Kaleibar