[1]
N. Abdalla, A. et al. 2018. 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. 7, 2.14 (Apr. 2018), 171–176. DOI:https://doi.org/10.14419/ijet.v7i2.14.12819.