N. ABDALLA, Ahmed; ALI, Kharudin; KOH SIAW PAW, Johnny; KOK HEN, Chong; JIAN DING, Tan; SHAM MAIZAL, M; IZZAT, M. Crack identification using piezoelectric testing on carbon steel pipe for transverse, longitudinal and hole defects with low excitation frequency. International Journal of Engineering and Technology, [S. l.], v. 7, n. 2.14, p. 171–176, 2018. DOI: 10.14419/ijet.v7i2.14.12819. Disponível em: https://sciencepubco.com/index.php/IJET/article/view/12819.. Acesso em: 9 apr. 2025.