?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=B&rft.au=Aubert%2C+B&rft.aulast=Aubert&rft.atitle=Observation+of+Upsilon(4S)+decays+to+pi(%2B)pi(-)Upsilon(1S)+and+pi(%2B)pi(-)Upsilon(2S)&rft.volume=96&rft.date=16+June+2006&rft.issue=23&rft.title=PHYS+REV+LETT&rft.issn=0031-9007&rft.genre=article