Inside Room 39 - North Korea's secret Orwellian location that funnels the regime's wealth
https://www.express.co.uk/news/world/1276998/north-korea-news-latest-kim-jong-un-regime-collapse-room-39-kim-yo-jong

Defector reveals secrets of North Korea's Office 39, raising cash for Kim Jong-un
https://www.abc.net.au/news/2018-01-06/north-korea-defector-reveals-secrets-of-office-39/9302308

Cash, Yachts, and Cognac: Kim Yo-Jong's Links to the Secretive Office Keeping North Korea's Elites in Luxury
https://time.com/5829508/kim-yo-jong-money-office-39/

North Korea: The secrets of Office 39
https://www.ft.com/content/4164dfe6-09d5-11e5-b6bd-00144feabdc0