?url_ver=Z39.88-2004&rft_id=10.1021%2Fjp012849n&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Piryatinski%2C+A&rft.aulast=Piryatinski&rft.aufirst=A&rft.issue=14&rft.volume=106&rft.date=11+April+2002&rft.issn=1089-5639&rft.atitle=Real+space+analysis+of+excitonic+interactions+and+coherence+length+in+helical+aggregates&rft.title=Journal+of+Physical+Chemistry+A&rft.pages=3524+-+3530&rft.genre=article