
https://publications.parliament.uk/pa/ld201719/ldselect/ldppdm/106/106.pdf

http://elkodaily.com/news/national/govt-and-politics/us-releases-list-of-russian-oligarchs-political-figures/article_ed99a49f-0bc3-5116-b42c-21d4dcc66d55.html

https://www.brookings.edu/research/what-internet-search-data-reveal-about-donald-trumps-first-year-in-office/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=60083862