M. Q. . Abdul Aziz, J. Idris, and M. F. Abdullah, “Experimental Study on Enclosed Gravitational Water Vortex Turbine (GWVT) Producing Optimum Power Output for Energy Production”, J. Adv. Res. Fluid Mech. Therm. Sc., vol. 95, no. 2, pp. 146–158, Jun. 2022.