
https://www.brookings.edu/techstream/how-do-recommender-systems-work-on-digital-platforms-social-media-recommendation-algorithms/

https://www.dhl.com/content/dam/dhl/global/dhl-spotlight/documents/pdf/2021-gci-update-report.pdf

https://www.iwkoeln.de/fileadmin/user_upload/Studien/IW-Trends/PDF/2018/IW-Trends_2018-03-07_Unternehmensaufspaltungen.pdf?mc_cid=e15c2358cf&mc_eid=286ad5ef5f