By Aven Eyvind   Lovas Kjell   Osmundsen Petter   in International Journal of Global Energy Issues

ISSN:0954-7118|26|1-2|158-169

Inderscience Publishers‎(2006)‎

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By Emhjellen Magne   Lovas Kjell   Osmundsen Petter   in International Journal of Global Energy Issues

ISSN:0954-7118|33|3-4|139-153

Inderscience Publishers‎(2010)‎

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