https://rg.ru/2021/04/01/rosstat-povysil-ocenku-vvp-za-2020-god-na-01-procentnogo-punkta.html
https://www.ng.ru/world/2021-03-31/1_8116_italy.html
https://ru.krymr.com/a/rossia-shpionazh-bolgaria/31173921.html
https://www.rosbalt.ru/piter/2021/03/29/1894418.html
https://www.thetimes.co.uk/article/edinburgh-professor-gave-names-to-fake-russia-spy-68n2n3bzj
https://www.inopressa.ru/article/26Mar2021/wsj/bulgaria.html