https://www.boeckler.de/pdf/p_wsi_report_52_2019.pdf
http://library.fes.de/pdf-files/bueros/rom/16042.pdf
Introduction Context Role of Germany The Taxes Considered Grand Themes of the European Dialogue ...
https://www.suerf.org/docx/f_ec43638b66e16a5bbede9b710b12b0c7_32333_suerf.pdf