1. Industrial Railway CAD software.
https://hwww.railcomplete.com/
2. Railway Infrastructure and Layout Aided Designer.
https://www.rail-aid.com/
3. The ERTMS/ETCS signalling system.
http://www.railwaysignalling.eu/wp-content/uploads/2016/09/ERTMS_ETCS_signalling_system_revF.pdf
4. Lecture Notes in Computer Science,2018
5. Lecture Notes in Computer Science;A Idani,2015