@INPROCEEDINGS{cheng13icraal,
  author = {R\'obert Busa-Fekete and Bal\'azs Sz\"or\'enyi and Paul Weng and Weiwei Cheng and Eyke H\"ullermeier},
  title = {Preference-based evolutionary direct policy search},
  booktitle = {Workshop Proceedings of Autonomous Learning},
  year = {2013},
  address = {Karlsruhe, Germany},
  month = {May}
}