https://www.europarl.europa.eu/doceo/document/A-9-2023-0155_EN.html
https://dwfgroup.com/en/news-and-insights/insights/2022/10/new-subsidy-control-regime-to-come-into-effect-from-wednesday-4-january-2023
https://www.ipp.eu/wp-content/uploads/2018/10/cepremap-macro-budget2019.pdf
https://www.imk-boeckler.de/download-proxy-for-faust/download-pdf?url=http%3A%2F%2F217.89.182.78%3A451%2Fabfrage_digi.fau%2Fp_imk_report_152e_2020.pdf%3Fprj%3Dhbs-abfrage%26ab_dm%3D1%26ab_zeig%3D8849%26ab_diginr%3D8482