https://www.rbc.ru/newspaper/2021/04/01/60644c979a7947f6bd5fe77d
https://www.kommersant.ru/doc/4752587
https://ru.krymr.com/a/khristo-grozev-o-provalakh-gru-v-bolgarii-i-italii/31182413.html
https://www.radiosvoboda.org/a/shpyhunskyy-skandal-italiya-stavyt-rosiyu-na-mistse/31182294.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.thetimes.co.uk/article/edinburgh-professor-gave-names-to-fake-russia-spy-68n2n3bzj