List of Articles Interval data Open Access Article Abstract Page Full-Text 1 - Efficiency Evaluation of Economic Enterprise in Presence of Interval Undesirable and Negative Data Mahnaz Maghbouli Mahdi Eini Farhad Taher Fatemeh Ghomanjani Open Access Article Abstract Page Full-Text 2 - A new robust optimization approach to most efficient formulation in DEA Reza Akhlaghi Mohsen Rostamy-Malkhalifeh Alireza Amirteimoori Sohrab Kordrostami