Kortenstedde, Frank, and Jan Stief. “Investigation and Optimization of an Untypical Vertical Axis Rotor of a Small Wind Turbine”. Journal of Mechanical and Energy Engineering 3, no. 3 (December 23, 2019): 245-258. Accessed December 7, 2022. https://jmee.tu.koszalin.pl/ojs/index.php/jmee/article/view/129.