1. 100% Renewable electricity: a roadmap to 2050 for Europe and North Africa;PricewaterhouseCoopers;PwC Corp,2014
2. Renewable electricity futures study[R];Hand,2014
3. Accomodating High Levels of Variable Generation, North Amer. Electr. Rel. Corp., Princeton, NJ, USA, 2009.
4. Harnessing Variable Renewables: A Guide to the Balancing Challenge;Chandler,2011
5. Taibi, E., Nikolakakis, T., Gutierrez, L., Fernandez, C., Kiviluoma, J., Rissanen, S. and Lindroos, T.J., 2018. Power system flexibility for the energy transition: Part 1, Overview for policy makers.