https://www.kommersant.ru/doc/5028300
https://www.washingtonpost.com/world/interactive/2021/us-russia-sanctions/
https://novayagazeta.ru/articles/2021/09/11/ukraintsam-nado-gotovitsia-k-prekrashcheniiu-tranzita
https://www.bbc.com/russian/news-58343090