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3. Science, policy and the coast: improving decision making;National Research Council,1995
4. Belgian Federal Governance Agreement, 2003−2007. Available at: 〈www.belgium.be/eportal〉
5. Council Directive 79/409/EEC of 2 April 1979 on the conservation of wild birds, OJ L 103, 24 March 1979, as amended and Council Directive 92/43/EEC of 21 May 1992 on the conservation of natural habitat and of wild fauna and flora, OJ L 206, 22 July 1992.