
https://www.investigate-europe.eu/posts/congo-brazzaville-european-oil-companies-petronor-perenco-secret-interests-with-ruling-family

https://www.brookings.edu/wp-content/uploads/2018/12/181224_Dollar_Sense_Solis.pdf

https://ecipe.org/wp-content/uploads/2024/02/ECI_OccasionalPaper_01-2024_LY06.pdf