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

https://mailchi.mp/bruegel/zhnghu-mundus-while-africas-economic-relations-with-china-are-hyped-its-relationship-with-the-eu-is-more-favourable

https://www.africantraderemedies.com/opinions/the-squeeze-can-trade-law-preserve-the-juice-in-south-africas-citrus-fruits/