@incollection{wierstraPGC,
        title = {Policy Gradient Critics},
        author = {Daan Wierstra and J\"{u}rgen Schmidhuber},
        journal = {Machine Learning: ECML 2007},
        pages = {466--477},
        year = 2007,
        url = {http://dx.doi.org/10.1007/978-3-540-74958-5\_43},
        id = {2361554},
	doi = {10.1007/978-3-540-74958-5\_43},
	biburl = {http://www.bibsonomy.org/bibtex/2fbb02eabf0d2dfcceb4cae9d05017e36/idsia},
	keywords = {actor-critic, action\_selection, policy\_gradient}
}