?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Koester%2C+D&rft.aufirst=D&rft.aulast=Koester&rft.title=Astronomy+%26+Astrophysics&rft.volume=566&rft.atitle=The+frequency+of+planetary+debris+around+young+white+dwarfs&rft.issue=A34&rft.issn=0004-6361&rft.date=June+2014&rft.genre=article