https://www.irishexaminer.com/news/arid-41138992.html
https://www.egmontinstitute.be/content/uploads/2022/05/TobiasGehrke_MartSmekens_PolicyBrief277.pdf?type=pdf
https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/fs-na82-entreprises-zombies-octobre-2019.pdf
https://www.bancaditalia.it/media/approfondimenti/2019/pop-bari/approfondimenti-popBari.pdf