http://www.euronews.com/2017/06/06/house-prices-signal-mixed-fortunes-for-europe
https://www.wto.org/english/tratop_e/tpr_e/s434_e.pdf
https://www.lrb.co.uk/v39/n18/swati-dhingra/how-not-to-do-trade-deals
http://www.guengl.eu/uploads/news-documents/Working_paper_Border_controls_on_cross_border_trade_in_goods.pdf