https://publications.parliament.uk/pa/cm201719/cmselect/cmworpen/769/769.pdf
https://www.documentcloud.org/documents/21416178-note-confidentiel-defense-du-12-mai-2016-ciemgg-russie
https://www.globalwitness.org/en/campaigns/oil-gas-and-mining/pipe-down/
https://www.epsu.org/sites/default/files/article/files/Going%20Public_EPSU-PSIRU%20Report%202019%20-%20EN.pdf