http://books.google.de/books?id=KV_B0n507QEC&pg=PA50&lpg=PA50&dq=windkraft+typologie&source=bl&ots=rN6JzdXO-H&sig=ZbxRFrrhR_v5yrk8crGLo-fk_cU&hl=de&sa=X&ei=m_VEVLLEEsPR7QaApoGgDg&ved=0CB0Q6AEwAA#v=onepage&q=windkraft%20typologie&f=false