1. UIC Safety Database.
https://safetydb.uic.org/IMG/pdf/sdb_ report_2018_ public.pdf
. Accessed 26 May 2019
2. Pleora Technologies.
https://www.pleora.com/markets/machine-vision/railway-inspection/
. Accessed 26 May 2019
3. Lecture Notes in Computer Science;A Berg,2015
4. Ukai, M., Nassu, B.T., Nagamine, N., Watanabe, M., Inaba, T.: Obstacle detection on railway track by fusing radar and image sensor. In: 9th World Congress on Railway Research, Lille, France (2011)
5. Babenko, P.: Visual inspection of railroad tracks. Ph.D. dissertation, University of Central Florida (2009)