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4. TWEA 2012 Turkish Wind Energy Association (TWEA), Turkish Wind Energy Statistics Report http://www.tureb.com.tr/files/yayinlar_ing/4._turkish_wind_energy_statistics_report_2012_february.pdf
5. REN21 2017 Renewables 2017 Global Status Report, p. 93 http://www.ren21.net/wp-content/uploads/2017/06/17-8399_GSR_2017_Full_Report_0621_Opt.pdf