http://www.kasparov.ru/material.php?id=5BA91CD36E650
https://meduza.io/feature/2018/09/22/eto-shtab-kvartira-gru-tak-i-chego
http://day.kyiv.ua/ru/blog/politika/vtoraya-samoletnaya-istoriya-ili-otstuplenie-putina
https://www.inopressa.ru/article/21Sep2018/time/oligarchs.html
https://www.gazeta.ru/column/zakharov/11977213.shtml
Moscow reached Paul Manafort at a crucial moment in the U.S. presidential race, as he was about to secure the nomination for Donald Trump
http://time.com/5401645/putins-oligarchs/
https://lb.ua/world/2018/09/20/407979_provalniy_god_rossiyskoy.html
https://ru.krymr.com/a/rossijskoe-delo-manaforta/29496160.html