?url_ver=Z39.88-2004&rft_id=10.1080%2F1726037X.2008.10698552&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Giorgio&rft.aulast=Gnecco&rft.au=Gnecco%2C+Giorgio&rft.title=Journal+of+Dynamical+Systems+and+Geometric+Theories&rft.atitle=Value+and+Policy+Function+Approximations+in+Infinite-Horizon+Optimization+Problems&rft.date=2008&rft.volume=6&rft.issue=2&rft.pages=123-147&rft.issn=1726-037X&rft.genre=article