?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Bergantino&rft.aufirst=Angela+Stefania&rft.issue=2&rft.volume=13&rft.date=April+2011&rft.issn=1467-9779&rft.atitle=Partial+Regulation+in+Vertically+Differentiated+Industries&rft.title=Journal+of+Public+Economic+Theory&rft.pages=255-287&rft.genre=article