https://op.europa.eu/en/publication-detail/-/publication/8ba0a8fd-4c83-11ea-b8b7-01aa75ed71a1
https://papers.ssrn.com/sol3/Delivery.cfm/SSRN_ID4092831_code1752653.pdf?abstractid=4092831&mirid=1
https://transparency.org.ru/special_posts/bottlelaundromat/en.php
https://www.brookings.edu/blog/techtank/2020/07/31/big-tech-and-antitrust-pay-attention-to-the-math-behind-the-curtain/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=92428572&utm_source=hs_email