
https://institutdelors.eu/wp-content/uploads/2021/10/BP_211006_La-primaute-du-droit-de-lUnion-europeenne_Omnes.pdf

https://www.usgs.gov/centers/national-minerals-information-center/rare-earths-statistics-and-information

http://library.fes.de/pdf-files/bueros/suedafrika/02828.pdf