https://www.theguardian.com/commentisfree/2016/nov/01/mi5-russia-putin-andrew-parker
https://www.stratfor.com/geopolitical-diary/being-russian-putins-russia
https://www.ft.com/content/ddc75502-a02a-11e6-891e-abe238dee8e2
http://inosmi.ru/social/20161102/238123758.html
http://inopressa.ru/article/02Nov2016/guardian/mi5_d.html
http://inosmi.ru/politic/20161102/238128921.html
http://carnegie.ru/commentary/?fa=65007
http://inosmi.ru/politic/20161102/238128364.html