@ARTICLE{cheng12mlc, author = {Johannes F\"urnkranz and Eyke H\"ullermeier and Weiwei Cheng and Sang-Hyeun Park}, title = {Preference-based reinforcement learning: a formal framework and a policy iteration algorithm}, journal = {Machine Learning}, year = {2012}, volume = {89}, pages = {123--156}, number = {1}, doi = {10.1007/s10994-012-5313-8}, url = {http://www.springerlink.com/content/d5024v586013x368/} }