https://www.einnews.com/pr_news/589110316/from-strategic-reassurance-to-running-over-roadblocks-a-review-of-xi-jinping-s-foreign-policy-record
https://ukandeu.ac.uk/study-of-federalism-uk-eu-relationship/?mc_cid=ef569320c7&mc_eid=815b1928ec
https://www.wto.org/english/tratop_e/envir_e/trade-climate-change_info_brief_no7_e.pdf