@inproceedings{sinha2016solving,
  title={Solving optimistic bilevel programs by iteratively approximating lower level optimal value function},
  author={Sinha, Ankur and Malo, Pekka and Deb, Kalyanmoy},
  booktitle={2016 IEEE Congress on Evolutionary Computation (CEC)},
  pages={1877--1884},
  year={2016},
  organization={IEEE}
}