http://www.theglobalipcenter.com/wp-content/uploads/2018/02/GIPC_IP_Index_2018.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
https://unlock.green/fr/publications/victoire-sur-la-dpeb-votee-par-le-parlement-europeen-mars-2023/
https://www.gov.uk/government/news/covid-19-sales-and-pricing-practices-during-coronavirus-outbreak