?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Schumann&rft.au=Schumann%2C+J&rft.aufirst=J&rft.date=11+August+2006&rft.atitle=Evidence+for+B+-%3Eeta(')pi+and+improved+measurements+for+B+-%3Eeta+'+K&rft.volume=97&rft.issn=0031-9007&rft.title=PHYS+REV+LETT&rft.issue=6&rft.genre=article