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2. G7 (2022a, 27 June), G7 Statement on Support for Ukraine, Elmau, Germany.
3. G7 (2022b, 28 June), G7 Leaders’ Communiqué — Executive Summary, Elmau, Germany.
4. Johnson, H. G. (1953), Optimum Tariffs and Retaliation, The Review of Economic Studies, 21(2), 142–153.
5. Latipov, O., C. Lau, K. Mahlstein and S. Schropp (2022), Quantifying the impact of the latest G7 sanctions on Russia — a sectoral analysis, Working Papers, 2022-08, The George Washington University, Institute for International Economic Policy, https://iiep.gwu.edu/2022/08/19/quantifying-the-impact-of-the-latest-u-s-tariff-sanctions-on-russia-a-sectoral-analysis/ (2 September 2022).