https://www.osw.waw.pl/sites/default/files/OSW-Report_The-middle-corridor_net.pdf
https://www.esri.ie/system/files/publications/RB202105_0.pdf
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/fomeef18002en.pdf
http://www.oecd.org/eco/outlook/economic-forecast-summary-united-kingdom-oecd-economic-outlook-june-2017.pdf