http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32014L0065&from=EN
https://theconversation.com/denmarks-biggest-spy-scandal-raises-questions-on-how-to-try-intelligence-officials-218372
https://www.supremecourt.gov/opinions/21pdf/20-1530_n758.pdf
https://curia.europa.eu/jcms/upload/docs/application/pdf/2020-05/cp200058it.pdf