?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Giorgio&rft.aulast=Gnecco&rft.au=Gnecco%2C+Giorgio&rft.title=Structural+properties+of+stochastic+dynamic+concave+optimization+problems+and+approximations+of+the+value+and+optimal+policy+functions&rft.date=2009&rft.genre=proceeding