https://en.euractiv.eu/wp-content/uploads/sites/2/special-report/EURACTIV-Special-Report-European-gas-markets.pdf
https://www.chathamhouse.org/2023/02/seven-ways-russias-war-ukraine-has-changed-world?utm_source=newsletter&utm_medium=email&utm_campaign=21%2F02%2F2023
https://www.publications.parliament.uk/pa/ld201617/ldselect/ldeucom/78/78.pdf