http://gabriel-zucman.eu/files/AJZ2017.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.tni.org/files/publication-downloads/marketforces-report-tni-statewatch.pdf
https://www.ipg-journal.de/interviews/artikel/das-vertrauen-vollstaendig-verloren-2934/