?url_ver=Z39.88-2004&rft_id=10.1080%2F10485259808832750&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Lavergne&rft.aufirst=Pascal&rft.issue=4&rft.volume=9&rft.date=1998&rft.issn=1048-5252&rft.atitle=An+integral+estimator+of+residual+variance+and+a+measure+of+explanatory+power+of+covariates+in+nonparametric+regression&rft.title=Journal+of+Nonparametric+Statistics&rft.pages=363-380&rft.genre=article