https://nationalinterest.org/feature/could-north-korea-be-the-next-energy-superpower-14471

https://maritime-executive.com/article/north-korea-has-excellent-oil-and-gas-potential

https://qz.com/1004330/north-korea-is-sitting-on-trillions-of-dollars-on-untapped-wealth-and-its-neighbors-want-a-piece-of-it/