
https://static.europeanchamber.com.cn/upload/documents/documents/Executive_Position_Paper_2019_2020%5B757%5D.pdf

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

https://static1.squarespace.com/static/603e6df5fbb8861bf7864b6c/t/64773377785ed9253f510651/1685533575306/UKTBC+Trading+our+way+to+prosperity+30_5_23+Digital.pdf