?url_ver=Z39.88-2004&rft_id=10.1063%2FPT.3.1928&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Orion&rft.aulast=Penner&rft.au=Penner%2C+Orion&rft.issue=4&rft.pages=8-9&rft.volume=66&rft.date=April+2013&rft.title=Physics+Today&rft.atitle=Commentary%3A+The+case+for+caution+in+predicting+scientists%E2%80%99+future+impact&rft.issn=0031-9228&rft.genre=article