http://sro.sussex.ac.uk/id/eprint/110932/1/BP-70.pdf
https://www.ifri.org/sites/default/files/atoms/files/lecompte_vircoulon_ue_acp_2021.pdf
https://ukandeu.ac.uk/wp-content/uploads/2021/11/Brexit-and-Services-Trade-Working-Paper.pdf
http://www.rand.org/content/dam/rand/pubs/research_reports/RR1700/RR1786z1/RAND_RR1786z1.pdf