ERTMS--delivering flexible and reliable rail traffic : a major industrial project for Europe - European Commission (Λουξεμβούργο: Υπηρεσία Επισήμων Εκδόσεων των Ευρωπαϊκών Κοινοτήτων, 2006)
Keywords: Railroads -- European Union countries -- Signaling; Railroads -- Safety measures -- European Union countries