?url_ver=Z39.88-2004&rft_id=doi%3A10.1016%2Fj.econlet.2010.05.025&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Bilancini%2C+Ennio&rft.aufirst=Ennio&rft.aulast=Bilancini&rft.title=Economics+Letters&rft.atitle=Single-valuedness+of+the+demand+correspondence+and+strict+convexity+of+preferences%3A+An+equivalence+result&rft.date=2010&rft.volume=108&rft.issue=3&rft.pages=299-302&rft.issn=01651765&rft.genre=article