6Mehmet Bilgili,Abdulkadir Yasar, Erdogan Simse- k.Offshore wind power development in Europe and its comparison with onshore counterpart. Renewable and Sustainable Energy Reviews,2011,15:905-915.
7European Environment Agency(EEA).Europe's onsh- ore and offshore wind energy potential,2009.
8Paula Ferreira, Filipa Vieira.Evaluation of an Offshore Wind PowerCost Reduction Prospects for Off- shore Wind Farms. World Academy of Science, Engineer- ing and Technology,2010,71:938-943.