?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Williams%2C+AD&rft.aulast=Williams&rft.aufirst=AD&rft.issue=2&rft.volume=22&rft.date=March+2008&rft.issn=1064-8011&rft.atitle=The+effect+of+ephedra+and+caffeine+on+maximal+strength+and+power+in+resistance-trained+athletes&rft.title=Journal+of+Strength+and+Conditioning+Research&rft.pages=464-470&rft.genre=article