https://www.wto.org/english/tratop_e/dispu_e/487abr_e.pdf
https://ukandeu.ac.uk/reforming-investor-state-dispute-settlement-eu-initiatives-and-uk-ambivalence/
https://ecipe.org/blog/eu-russia-trade-since-the-war/
https://trade.ec.europa.eu/doclib/docs/2018/april/tradoc_156791.pdf