1. Agency for Natural Resources and Energy http://www.meti.go.jp/committee/kenkyukai/k_9.html
2. Analysis and operation technologies 2007.
3. Issues for PV large penetration in the future electric power system. The Papers of Joint Technical Meeting on Power Engineering and Power Systems Engineering;Okumoto;IEE Japan,2010.
4. Issues about system analysis and operation schedule in future power system: Robust security regions. The Papers of Joint Technical Meeting on Power Engineering and Power Systems Engineering;Fujita;IEE Japan,2010.
5. Issues for power system operation for future renewable energy penetration-Robust power system security.;Yorino;IEEJ Trans PE,2011