1. Electrical Reliability Council of Texas, Reliability Operations Sub-committee report, System Planning Division, March 2010
2. ‘PRC-024-WECC-1-CR – generator low voltage ride-through criterion’, http://www.wecc.biz/Standards/Development/WECC-60/Shared%20Documents/WECC-0060%20PRC-024-WECC-1-CR%20 Low%20Voltage%20Ride%20Through%20Criterion%20Draft%201% 202-20-08.pdf
3. Advanced grid requirements for the integration of wind farms into the Spanish transmission system
4. ‘ERCOT operational guides’, Section 3 on Operational interfaces, pp. 3–24