The first agreement on the passenger controls in international railways (only in French, 27.01.2017) http://www.lalibre.be/actu/international/premier-accord-sur-le-controle-des-passagers-des-trains-internationaux-588ae0b4cd70ff671dd319d8

Fight against terrorism: First agreement on passenger controls in international railways (only in French, 27.01.2017) https://www.rtbf.be/info/belgique/detail_lutte-antiterroriste-premier-accord-sur-le-controle-des-passagers-des-trains-internationaux?id=9514221

EDRi: FAQ: Passenger Name Records (PNR) https://edri.org/faq-pnr/

“The curious tale of the French Prime Minister, PNR and Peculiar Patterns (04.10.2016) https://www.euractiv.com/section/justice-home-affairs/opinion/checked-for-tuesthe-curious-tale-of-the-french-prime-minister-pnr-and-peculiar-patterns/

EU PNR: EDPS warns against unjustified and massive collection of passenger data (25.09.2015) https://secure.edps.europa.eu/EDPSWEB/webdav/site/mySite/shared/Documents/EDPS/PressNews/Press/2015/EDPS-2015-08-EDPS_PNR_EN.pdf