?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Ying+Guang&rft.aulast=Shi&rft.au=+Shi+Ying+Guang&rft.issn=0001-6969&rft.pages=251-259&rft.date=1995&rft.issue=1-4&rft.volume=61&rft.title=Acta+scientiarum+mathematicarum&rft.atitle=Some+extremal+problems+concerning+polynomials&rft.genre=article