@article{li2016efficient,
  title={Efficient nondomination level update method for steady-state evolutionary multiobjective optimization},
  author={Li, Ke and Deb, Kalyanmoy and Zhang, Qingfu and Zhang, Qiang},
  journal={IEEE transactions on cybernetics},
  volume={47},
  number={9},
  pages={2838--2849},
  year={2016},
  publisher={IEEE}
}