Loan, Pham Thi Kim, and Bui Van Ga. “3D Unsteady Turbulent Flow Analysis in a Francis Turbine Runner at Nominal and off-Design Operating Conditions”. <i>Vietnam Journal of Mechanics</i>, vol. 26, no. 3, Aug. 2004, pp. 148-56, doi:10.15625/0866-7136/26/3/5699.