
https://insightcrime.org/wp-content/uploads/2023/05/The-Flow-of-Precursor-Chemicals-for-Synthetic-Drug-Production-in-Mexico-InSight-Crime-March-2023-3.pdf

https://www.ceps.eu/system/files/CEPS%20-%20LINKEDIN%20study%20FINAL.pdf

https://www.eurolitnetwork.com/russian-and-me-by-katia-gregor/