?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Gauger&rft.aufirst=EM&rft.au=Gauger%2C+EM&rft.date=25+January+2011&rft.issue=4&rft.pages=-&rft.volume=106&rft.issn=0031-9007&rft.title=Physical+Review+Letters&rft.atitle=Sustained+quantum+coherence+and+entanglement+in+the+avian+compass.&rft.genre=article