
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://policyexchange.org.uk/wp-content/uploads/2017/07/After-Brexit-will-Ireland-be-next-to-exit-1.pdf

https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef22024en.pdf