List of Articles Imprecise data envelopment analysis Open Access Article Abstract Page Full-Text 1 - A One-Model Method Based on a Relaxed Combination of Inputs for Congestion Assessment in Interval Data Envelopment Analysis Masoumeh Hajiani Reza Fallahnejad Open Access Article Abstract Page Full-Text 2 - Increasing discrimination efficiency in data envelopment analysis with imprecise input and output Saeid Shahghobadi Farhad Moradi Abas Ghomashi