?url_ver=Z39.88-2004&rft_id=10.1109%2FTIT.2010.2090198&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Giorgio&rft.aulast=Gnecco&rft.au=Gnecco%2C+Giorgio&rft.issn=0018-9448&rft.pages=549-558&rft.issue=1&rft.volume=57&rft.date=2011&rft.title=IEEE+Transactions+on+Information+Theory&rft.atitle=On+a+Variational+Norm+Tailored+to+Variable-Basis+Approximation+Schemes&rft.genre=article