List of Articles Production possibility set Open Access Article Abstract Page Full-Text 1 - An algorithm for the anchor points of the PPS of the CCR model Dariush Akbarian 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 Open Access Article Abstract Page Full-Text 3 - Estimate Output of a Production Unit in Production Possibility Set with Fuzzy Inference Mechanism Mohamad Adabitabar firozja Mohamad Adabi firozjaei Mousa Eslamian