@article{Moravej15,
  author 	= {Zahra Moravej and Farhad Adelnia and Fazel Abbasi},
  title 		= {{Optimal coordination of directional overcurrent relays using NSGA-II}},
  journal 	= {Electric Power Systems Research}, 
  volume 	= {119},
  pages 	= {228--236},
  month 	= {February},
  year 	= {2015}
}