“Numerical Study and Theoretical Comparison of Outlet Hole Geometry for a Gravitational Vortex Turbine”, Indonesian J. Sci. Technol, vol. 6, no. 3, pp. 491–506, Nov. 2023, Accessed: Aug. 23, 2025. [Online]. Available: https://ejournal.kjpupi.id/index.php/ijost/article/view/81