1. M. Zvanik, OC presentation at CFA show, Tampa, Florida, 2001
2. IEC 61400-1, Wind turbines, Part 1: Design requirements, edition 3, International Electrotechnical Commission, 2005
3. Guideline for the certification of offshore wind turbines, Germanische Lloyd, 2005
4. Guideline for the certification of wind turbines, with supplement 2004, Germanische Lloyd, 2003
5. http://www.gl-group.com