1. GREENWOOD, https://www.greenwood.dk/miniprofbtrail.php
2. MERMEC, http://www.mermecgroup.com/inspection-technology/track-measurement/185/1/track-geometry.php
3. ENSCO, http://www.ensco.com/products-services/rail-technologies/track-inspection-systems/rail-surface-wear-condition.htm
4. Concurrent Engineering in the 21st Century;Šagi,2015
5. State of the art on vision-based structured light systems for 3D measurements;Ribo;International Workshop on Robotic Sensors: Robotic and Sensor Environments,2005