?url_ver=Z39.88-2004&rft_id=10.1017%2FS0266466600007143&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Florens&rft.aufirst=Jean-Pierre&rft.issue=5&rft.volume=12&rft.date=December+1996&rft.atitle=Sobolev+Estimation+of+Approximate+Regressions&rft.title=Econometric+Theory&rft.pages=753-772&rft.genre=article