1. Lewin TJ (2010) An investigation of design alternatives for 328-ft (100-m) tall wind turbine towers. Graduate Theses and Dissertations, Iowa State University
2. U.S. Department of Energy (2008) 20% Wind power by 2030.
http://www.20percentwind.org
3. Gencturk B, Attar A, Tort C (2012) Optimal design of lattice wind turbine towers. In: Proceedings of the 15th world conference on earthquake engineering, Lisbon, Portugal
4. Dvorak P (2010) GE introduces 2.75 MW wind turbines. Windpower Eng Dev.
http://www.windpowerengineering.com
, visited 2014
5. Siemens wind turbine with ATS hybrid tower completed. Sun Wind Energy, 2009.
http://www.sunwindenergy.com
, visited 2014