?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Nakicenovic%2C+N.&rft.aulast=Nakicenovic&rft.aufirst=N.&rft.issue=1995&rft.volume=Fall&rft.date=1995&rft.atitle=Energy+Strategies+for+a+Carbon-Free+Future&rft.title=Siemens+Review+(R%26D+Special)&rft.pages=4-6&rft.genre=article