?url_ver=Z39.88-2004&rft_id=10.1073%2Fpnas.0911983106+&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Podobnik&rft.aufirst=Boris&rft.au=Podobnik%2C+Boris&rft.atitle=Cross-correlations+between+volume+change+and+price+change&rft.title=Proceedings+of+the+National+Academy+of+Sciences&rft.date=2009&rft.volume=106&rft.issue=52&rft.pages=22079-22084&rft.issn=1091-6490&rft.genre=article