
https://www.brookings.edu/blog/order-from-chaos/2017/11/15/the-new-geopolitics-of-trade-in-asia/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=58493399

https://institute.global/insight/middle-east/assessing-israels-trade-its-arab-neighbours?utm_source=Institute+Interest&utm_campaign=591ede149a-EMAIL_CAMPAIGN_2018_03_28_COPY_01&utm_medium=email&utm_term=0_a778d447d9-591ede149a-65414641

http://www.guengl.eu/uploads/news-documents/Working_paper_Border_controls_on_cross_border_trade_in_goods.pdf