?url_ver=Z39.88-2004&rft_id=1835924&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=+Kov%C3%A1cs+Adri%C3%A1na&rft.aulast=Kov%C3%A1cs&rft.aufirst=Adri%C3%A1na&rft.date=2008&rft.atitle=Natural+phenanthrenes+and+their+biological+activity&rft.title=PHYTOCHEMISTRY&rft.pages=1084-1110&rft.issn=0031-9422&rft.volume=69&rft.genre=article