- britannica.com technology/wind-turbine
- turbinegenerator.org wind/
- clubtechnical.com wind-turbine
- elprocus.com darrieus-wind-turbine-working/
- statista.com statistics/272813/market-share-of-…
- enelgreenpower.com learning-hub/renewable-…
- bls.gov ooh/installation-maintenance-and-repair/…
- research.sabanciuniv.edu id/eprint/18852/1/IRENEC…