Fueling Europe in the future : the long-term energy problem in the EC countries: alternative R & D strategies : final report to the Commission of the European Communities Contract No. ECI-391-698-80-ÖR / W. Sassin, A. Hölzl, H.-H. Rogner, and L. Schrattenholzer. - Sassin, Wolfgang (Research Reports - International Institute for Applied Systems Analysis, 1983)