M. Ragheb (28 February 2010), "Modern Wind Generators"(PDF), netfiles.uiuc.edu, Table 1. "Wind turbine manufacturers share of installed capacity as of 2005", archived from the original(PDF) on 18 December 2012, retrieved 26 March 2012
M. Ragheb (28 February 2010), "Modern Wind Generators"(PDF), netfiles.uiuc.edu, "Ecotècnia wind turbines", also Table 1. "Wind turbine manufacturers share of installed capacity as of 2005", archived from the original(PDF) on 18 December 2012, retrieved 26 March 2012
Toke, D; et al. (2007). "Wind power development outcomes: How can we account for the differences?". Renewable and Sustainable Energy Reviews. 11 (3). Elsevier: 467–481. doi:10.1016/j.rser.2006.10.021.
M. Ragheb (28 February 2010), "Modern Wind Generators"(PDF), netfiles.uiuc.edu, Table 1. "Wind turbine manufacturers share of installed capacity as of 2005", archived from the original(PDF) on 18 December 2012, retrieved 26 March 2012
M. Ragheb (28 February 2010), "Modern Wind Generators"(PDF), netfiles.uiuc.edu, "Ecotècnia wind turbines", also Table 1. "Wind turbine manufacturers share of installed capacity as of 2005", archived from the original(PDF) on 18 December 2012, retrieved 26 March 2012
"Spain's wind power industry on a roll". Renewable Energy Access. 24 August 2005. Archived from the original on 19 November 2007. Retrieved 28 January 2007.