RUIZ SÁNCHEZ, Alejandro, Angie GUEVARA MUÑOZ, Jorge Andrés SIERRA DEL RIO, and Jose Alejandro POSADA MONTOYA. “Numerical Comparison of Two Runners for Gravitational Vortex Turbine”. Engineering Transactions 69, no. 1 (January 26, 2021): 3–17. Accessed January 17, 2026. http://et.ippt.gov.pl/index.php/et/article/view/1165.