Jeffrey Johns Marek Petrik Sridhar Mahadevan Hybrid Least-Squares Algorithms for Approximate Policy Evaluation. 9 2009 ECML/PKDD (1) http://dx.doi.org/10.1007/978-3-642-04180-8_9 conf/pkdd/2009-1 db/conf/pkdd/pkdd2009-1.html#JohnsPM09