
https://www.energy.senate.gov/public/index.cfm/files/serve?File_id=77F2C6DE-500B-4AE1-8C45-170B2DEFB78A

https://www.lameduse.ch/2018/05/25/la-meduse-a-lu-affaire-gurtel-des-verdicts-qui-ebranlent-lespagne/

https://www.secours-catholique.org/sites/scinternet/files/publications/rapport_revenusans_contreparties.pdf