https://cerre.eu/wp-content/uploads/2023/07/CERRE-Virtual-Worlds-Issue-Paper-0723.pdf
https://op.europa.eu/en/publication-detail/-/publication/8ba0a8fd-4c83-11ea-b8b7-01aa75ed71a1
https://opportunityinsights.org/wp-content/uploads/2020/05/tracker_paper.pdf
https://www.mckinsey.com/industries/social-sector/our-insights/the-art-of-data-empowering-art-institutions-with-data-and-analytics#/