http://www.nationalcrimeagency.gov.uk/publications/european-arrest-warrant-statistics
http://www.irsd.be/website/images/livres/rmb/19/ed_19_art_16.pdf
https://www.transparency.de/fileadmin/Redaktion/Publikationen/2019/19-09-01_TI-D_Gutachten_Momsen.pdf
https://rusi.org/commentary/defence-sector-corruption-underestimated-foe-times-crisis