List of Articles Controllable processing times Open Access Article Abstract Page Full-Text 1 - A Bi-Objective Airport Gate Scheduling with Controllable Processing Times Using Harmony Search and NSGA-II Algorithms Morteza khakzar Bafruei Sananz khatibi Morteza Rahmani 10.22094/joie.2018.234 20.1001.1.22519904.2018.11.1.6.6