1. EIA. U.S. Energy Information Administration, Electric power monthly, April 2019. 2019. https://www.eia.gov/todayinenergy/detail.php?id=39992#:~:text=U.S.%20electricity%20generation%20from%20renewables%20surpassed%20coal%20in%20April&text=In%20April%202019%2C%20U.S.%20monthly,electricity%20generation%20to%20coal's%2020%25.
2. Chao H, Oren S, Wilson R. Reevaluation of vertical integration and unbundling in restructured electricity markets, chapter 1 in the book. In: Sioshansi FP, editor. Competitive electricity markets, design, implementation and performance. 2008.
3. EPRI. Integrated engineering and economic operation of power systems, Electric power research institute report, co-authors: Chao, H., S. Oren, A. Papalexopoulos, D. Sobajic and R. Wilson. 2004.
4. Hogan WW. Electricity market design and zero-marginal cost generation Prepared for Current Sustainable/Renewable Energy Reports. 2021. https://scholar.harvard.edu/files/whogan/files/hogan_emd_102121.pdf
5. Joskow P. Challenges for wholesale electricity markets with intermittent renewable generation at scale. Oxf Rev Econ Policy. 2019;35(2):291–331.