V.GANESH3, V.S. SANJANA DEVI4, S. J. K. T. T. Automotive Crack Detection for Railway Track Using Ultrasonic Sensorz. International Journal of Engineering Technology and Computer Research, [S. l.], v. 4, n. 6, 2016. Disponível em: https://www.ijetcr.org/index.php/ijetcr/article/view/339. Acesso em: 6 oct. 2026.