
https://carnegieendowment.org/files/202110-Brattberg_et_al_EuropeChina_final.pdf

https://www.socialeurope.eu/breaking-the-chains-subcontracting-in-the-eu

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