List of Articles Transportation problem Open Access Article Abstract Page Full-Text 1 - An Approximation Method for Fuzzy Fixed-Charge Transportation Problem Ali Mahmoodirad Masoud Sanei Open Access Article Abstract Page Full-Text 2 - SOLVING A STEP FIXED CHARGE TRANSPORTATION PROBLEM BY A SPANNING TREE-BASED MEMETIC ALGORITHM Saber Molla-Alizadeh-Zavardehi Masoud Sanei Reza Soltani Ali Mahmoodirad Open Access Article Abstract Page Full-Text 3 - AN ELECTROMAGNETISM-LIKE ALGORITHM FOR FIXED CHARGE SOLID TRANSPORTATION PROBLEM Masoud Sanei Ali Mahmoodirad Saber Molla-Alizadeh-Zavardehi