https://static.rusi.org/288_EI_Italy_Russia_China.pdf
http://blogs.lse.ac.uk/brexit/2018/05/15/switzerland-wanted-more-immigration-controls-but-economic-self-interest-will-probably-prevail/
https://insightcrime.org/wp-content/uploads/2023/05/El-flujo-de-precursores-quimicos-para-la-produccion-de-drogas-sinteticas-en-Mexico-InSight-Crime-May-2023.pdf