https://www.iiss.org/en/publications/strategic-comments/2023/the-state-of-china-russia-cooperation-over-natural-gas/

https://amp.theguardian.com/world/2014/may/21/russia-30-year-400bn-gas-deal-china

https://markets.businessinsider.com/news/commodities/russia-china-energy-trade-discount-turkey-europe-buyers-ukraine-beijing-2023-9

https://www.reuters.com/business/energy/russias-weaker-hand-undermines-case-power-siberia-2-gas-link-china-2023-10-30/