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http://www.fiia.fi/en/publication/626/state-led_nationalism_in_today_s_russia/
http://www.euractiv.com/section/energy/news/poland-puts-hopes-in-northern-gate-gas-pipeline/
https://www.chathamhouse.org/expert/comment/businesses-are-chipping-away-sanctions-crimea-and-donbas
http://inosmi.ru/politic/20161018/238039596.html
https://focus.ua/world/357901/