@article{deb2015optimality,
  title={An optimality theory-based proximity measure for set-based multiobjective optimization},
  author={Deb, Kalyanmoy and Abouhawwash, Mohamed},
  journal={IEEE Transactions on Evolutionary Computation},
  volume={20},
  number={4},
  pages={515--528},
  year={2015},
  publisher={IEEE}
}