1. IRENA – International Renewable Energy Agency, .
2. Experience and challenges with short-term balancing in European systems with large share of wind power;Söder;IEEE Trans. Sust. Energy,2012
3. R. Angehrn, Safety engineering for the 423 MW-pelton-runners at bieudron, in: 20th IAHR Symposium, August 6–9, 2000, Charlotte, N.C., USA, 2000.
4. Hydraulic Turbines, Design, Erection and Operation;Brekke,2001
5. H. Grein, R. Anghern, M. Lorentz, Inspection periods of pelton turbine runners, in: Proceeding IAHR Symposium, Stirling, UK, 1984.