?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=H%C3%A4fele%2C+W.&rft.aulast=H%C3%A4fele&rft.aufirst=W.&rft.issue=4338&rft.volume=200&rft.date=April+1978&rft.issn=1095-9203&rft.atitle=Energy+Options+and+Strategies+for+Western+Europe&rft.title=Science&rft.pages=164-167&rft.genre=article