MACHAŁA, Piotr; DARSZNIK, Sebastian; MIERZWA, Jarosław; UCHROŃSKI, Patryk. Calibration reflectors in ultrasonic testing of railway axles. Welding Technology Review, [S. l.], v. 89, n. 11, 2017. DOI: 10.26628/wtr.v89i11.829. Disponível em: https://pspaw.pl/pspaw/article/view/829. Acesso em: 13 jun. 2025.