List of Articles Membership function Open Access Article Abstract Page Full-Text 1 - Mathematical solution of multilevel fractional programming problem with fuzzy goal programming approach Kailash Lachhwani Mahaveer Prasad Poonia Open Access Article Abstract Page Full-Text 2 - An iterative method for tri-level quadratic fractional programming problems using fuzzy goal programming approach Semu Mitiku Kassa Teklay Hailay Tsegay