https://www.globalfinancialgovernance.org/assets/pdf/G20EPG-Full%20Report.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_159e_2020.pdf%3Fprj%3Dhbs-abfrage%26ab_dm%3D1%26ab_zeig%3D8946%26ab_diginr%3D8482
https://www.politico.eu/article/gert-jan-koopman-top-eu-official-helps-run-a-luxury-hotel-in-bali-and-never-had-to-tell-brussels/
https://www.economiesuisse.ch/de/artikel/der-swiss-code-begruesst-ein-weiteres-mitglied