1. REN21, Renewables 2020 Global Status Report, REN21 Secretariat, Paris (2020).
2. International Hydropower Association, 2020 Hydropower Status Report: Sector Trends and Insights, International Hydropower Association, London (2020).
3. P. Dorfler, M. Sick and A. Coutu, Flow Induced Pulsation and Vibration in Hydro-Electric Machinery, Springer, London, England (2013).
4. M. Nishi, T. Kubota, S. Matsunaga and Y. Senoo, Study on swirl flow and surge in an elbow type draft tube, IAHR Symposium, Tokyo (1980).
5. F. Casanova, Failure analysis of the draft tube connecting bolts of a Francis-type hydroelectric power plant, Engineering Failure Analysis, 16(7) (2009) 2202–2208.