https://open.overheid.nl/documenten/ronl-48b77cf7bdf0f91d4ed394ca2a37d2041bc50647/pdf
https://institute.global/news/brexit-what-we-now-know
http://english.bdi.eu/#/article/news/robust-economy-no-cause-for-complacency/
https://www.dbresearch.de/PROD/RPS_DE-PROD/PROD0000000000523908/Deutschland%3A_Konjunktur_kurzgefasst.PDF