List of Articles Outputs. Open Access Article Abstract Page Full-Text 1 - Evaluating the efficiency and classifying the fuzzy data: A DEA based approach S. Kordrostami G. Farajpour‎ M. Jahani Sayyad Noveiri Open Access Article Abstract Page Full-Text 2 - An inverse DEA approach in the presence of undesirable outputs based on the directional distance function Javad Gerami Open Access Article Abstract Page Full-Text 3 - Fixed cost allocation in two-stage system in the presence of undesirable outputs Leila Emami Farhad Hosseinzadeh Lotfi Mohsen Rostamy