https://www.bbc.com/russian/news-46634092
https://www.bbc.com/russian/news-46634112
https://www.novayagazeta.ru/articles/2018/12/20/78994-bolshe-konfrontatsii-bolshe-deneg
https://www.gazeta.ru/business/2018/12/19/12101023.shtml
http://expert.ru/2018/12/19/nemetskij-biznes/
https://www.gazeta.ru/politics/2018/12/19_a_12100165.shtml