1. X. Zheng “Pumped storage hydropower to bloom in China ” China Daily (2021); www.chinadaily.com.cn/a/202109/29/WS6153f4d8a310cdd39bc6c5b9.html.
2. US Department of Energy “U.S. hydropower market report” (2021); www.energy.gov/sites/prod/files/2021/01/f82/us-hydropower-market-report-full-2021.pdf.
3. International Renewable Energy Agency “Innovative operation of pumped hydropower storage” (2020); www.irena.org/-/media/Files/IRENA/Agency/Publication/2020/Jul/IRENA_Innovative_PHS_operation_2020.pdf.
4. National Hydropower Association “2018 pumped storage report” (2018); www.hydro.org/wp-content/uploads/2018/04/2018-NHA-Pumped-Storage-Report.pdf.
5. R. van Treeck , Sustain. Energ. Technol. Assess. 43, 100903 (2021).