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2. 4th NC to UNFCCC of the Hellenic Republic, 2006, (at: 〈http://unfccc.int〉).
3. Bohringer, C., Hoffmann, T., Rutherford, F.T., 2006. Alternative Strategies for Promoting Renewable Energy in EU Electricity Markets. 〈http://www.mpsge.org/qtool/electricity.pdf〉.
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