?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Zorboska&rft.aufirst=Nina&rft.au=+Zorboska+Nina&rft.volume=55&rft.issn=0001-6969&rft.pages=399-402&rft.title=Acta+scientiarum+mathematicarum&rft.atitle=Hyponormal+composition+operators+on+weighted+Hardy+spaces&rft.date=1991&rft.issue=3-4&rft.genre=article