Tønnesson, Stein (2006) Energisikkerhetens globalpolitikk [The Politics of Energy Security], Statoil magasin (52–24). 11 January.
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Tønnesson, Stein (2006) Energisikkerhetens globalpolitikk [The Politics of Energy Security], Statoil magasin (52–24). 11 January.