
https://ca1-eci.edcdn.com/reports/ECIU-Oxford_Taking_Stock.pdf?v=1616461369

https://wiiw.ac.at/the-energy-transition-in-the-western-balkans-the-status-quo-major-challenges-and-how-to-overcome-them-dlp-6896.pdf

https://www.epsu.org/sites/default/files/article/files/Going%20Public_EPSU-PSIRU%20Report%202019%20-%20EN.pdf