Karki B, Subedi A, Sigdel H, Bartaula P. Design, simulation and performance evaluation of vertical axis helical wind turbine. Jnl Innov. Engin. Educ. [Internet]. 2019 Mar. 1 [cited 2024 May 19];2(1):1-13. Available from: https://nepjol.info/index.php/jiee/article/view/36661