https://novayagazeta.ru/articles/2019/12/17/83182-kooperativ-ozero-vinvard
https://www.finanz.ru/novosti/aktsii/rosstat-zafiksiroval-obvalnoe-padenie-avtoproma-1028767982
Geopolitical tensions between Russia and Ukraine, U.S. gas exports and European pipelines - just some issues complicating a new gas deal.
https://www.cnbc.com/2019/12/16/ukraine-and-russia-look-to-strike-gas-transit-deal.html
https://www.radiosvoboda.org/a/chomu-ec-prodovzhyv-sanktsiji-proty-rosiji/30328536.html
https://newizv.ru/article/general/16-12-2019/rossiya-mezhdu-sokurovym-i-kadyrovym