https://www.ilo.org/wcmsp5/groups/public/@dgreports/@dcomm/documents/briefingnote/wcms_743146.pdf
http://ec.europa.eu/epsc/sites/epsc/files/epsc_europe_is_back_trends_jan.pdf
https://www.baua.de/DE/Angebote/Publikationen/Berichte/F2398.pdf?__blob=publicationFile&v=3
http://www.iata.org/whatwedo/Documents/economics/impact_of_brexit.pdf