@inproceedings{sinha2014improved,
  title={An improved bilevel evolutionary algorithm based on quadratic approximations},
  author={Sinha, Ankur and Malo, Pekka and Deb, Kalyanmoy},
  booktitle={2014 IEEE congress on evolutionary computation (CEC)},
  pages={1870--1877},
  year={2014},
  organization={IEEE}
}