• https://www.wavestone.com/app/uploads/2017/04/driverless-metro-lines-world.pdf WORLD’S BEST DRIVERLESS METRO LINES 2017 - wavestone
• http://metroautomation.org/ UITP Observatory of Automated Metros
• https://hal.archives-ouvertes.fr/hal-00337681/document AUTOMATISATION INTEGRALE DE LA LIGNE 1 : ETUDE ET MODELISATION DU TRAFIC MIXTE Mylène Belmonte, Gerald Churchill, Walter Schon, Jean-Louis Boulanger
• http://www.cifi.it/UplDocumenti/torino12/06%20Dario%20Romano%20ANSALDOBreda.pdf
• http://www.ansaldo-sts.com/sites/ansaldosts/files/brochures/copenhagen\_metro.pdf
• http://www.railsystem.net/metro-automation/
• http://www.tecnositaf.it/download/SicurezzaTunnel\_nov08.pdf