http://www.sgi-network.org/2017/About
http://www.economics-ejournal.org/economics/journalarticles/2017-4
https://www.elysee.fr/emmanuel-macron/2024/04/24/discours-sur-leurope
https://www.europarl.europa.eu/RegData/etudes/IDAN/2021/699811/IPOL_IDA%282021%29699811_EN.pdf