List of Articles Open Access Article Abstract Page Full-Text 1 - Fuzzy bi-level linear programming problem using TOPSIS approach Shyamali Ghosh Sankar Kumar Roy Open Access Article Abstract Page Full-Text 2 - A Hybrid Algorithm for Fault Diagnosis using Fuzzy Clustering Tools Adrián Rodríguez Ramos Pedro Juan Rivera-Torres Antônio José da Silva Neto Orestes Llanes-Santiago Open Access Article Abstract Page Full-Text 3 - Optimum Selection of Drill Bits for Drilling Operations in Sarvak and Asmari Formations Using a Fuzzy Multiple Criteria Decision-Making Approach آرش ابراهیم آبادی سیاوش مرادی Open Access Article Abstract Page Full-Text 4 - The Reference Ideal Method and the Pythagorean Fuzzy Numbers Elio Cables María Teresa Lamata Jose Luis Verdegay Open Access Article Abstract Page Full-Text 5 - Ranking method for efficient units by RPA and TOPSIS in DEA فرزاد رضائی بالف Open Access Article Abstract Page Full-Text 6 - An Optimization Function On Depreciation of Assets Reza Fallah-Moghaddam