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2. Tkachev, I. (2020). The price of oil fell below zero for the first time in history. What is important to know. RBC, April 21. https://www.rbc.ru/economics/21/04/2020/5e9df3249a79470ff099ae32
3. FAS Russia (2021). Principles of economic analysis of pricing practices for their compliance with the Law on Protection of Competition, approved by the Presidium of the FAS Russia on December 22, 2021.
4. Finmarket (2022). The Federal Antimonopoly Service called on petrochemical companies to abandon the netback in prices and give priority to supplies to the domestic market. Finmarket, 29 March. http://www.finmarket.ru/news/5687040
5. Shastitko, A.E. (2010). "Comparable Markets" as an Instrument of Antimonopoly Policy. Voprosy Ekonomiki, 5, 96-109. https://doi.org/10.32609/0042-8736-2010-5-96-109.