@INPROCEEDINGS{6256557, author={Sinha, Ankur and Malo, Pekka and Deb, Kalyanmoy}, booktitle={2012 IEEE Congress on Evolutionary Computation}, title={Unconstrained scalable test problems for single-objective bilevel optimization}, year={2012}, volume={}, number={}, pages={1-8}, doi={10.1109/CEC.2012.6256557}}