?url_ver=Z39.88-2004&rft_id=++++++++doi%3A10.1016%2Fj.joi.2013.07.003&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Petersen%2C+Alexander+M.&rft.aulast=Petersen&rft.aufirst=Alexander+M.&rft.title=Journal+of+Informetrics&rft.atitle=The+Z-index%3A+A+geometric+representation+of+productivity+and+impact+which+accounts+for+information+in+the+entire+rank-citation+profile&rft.date=October+2013&rft.volume=7&rft.issue=4&rft.pages=823-832&rft.genre=article