https://www.wto.org/english/res_e/booksp_e/anrep_e/ar23_e.pdf
https://www.piie.com/sites/default/files/documents/wp22-12.pdf
https://institute.global/sites/default/files/2020-07/Tony%20Blair%20Institute%2C%20A%20Path%20to%20Brexit%20Agreement%2C%20July%202020.pdf
https://www.ceps.eu/wp-content/uploads/2021/03/PI2021-05_The-power-surplus.pdf