
https://www.openmarketsinstitute.org/publications/sling-de-economizing-antitrust-law-starts-with-market-definition

https://towardsdatascience.com/power-bi-add-category-other-to-charts-354267ec1809

https://www.epsu.org/sites/default/files/article/files/EPSU%20Report%20Outsourcing%20state_EN.pdf