
https://www.bain.com/globalassets/about/2023-global-pe-report—roadshow-deck.pdf

https://www.pymnts.com/news/b2b-payments/2020/deloitte-becomes-first-of-big-four-to-break-up-business/

https://www.oecd-ilibrary.org/docserver/f97beae7-en.pdf?expires=1646810684&id=id&accname=guest&checksum=AAB69BF9AC6696BD5622F1A55B317C16