Danieal Aderson Sinaga, Muhamad Dwi Septiyanto, Zainal Arifin, Gunawan Rusdiyanto, Singgih Dwi Prasetyo, and Syamsul Hadi. “The Effect of Blade Distances on the Performance of Double-Stage Gravitational Water Vortex Turbine”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 109, no. 1 (October 30, 2023): 196–209. Accessed July 3, 2024. https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/1764.