M. Yusof, M.F., N. Jamaludin, S. Abdullah, Z.H. Hanafi, and M.S. M. Zain. 2012. “Monitoring and Assessment of Acoustic Emission Signatures During Fatigue Mechanism of API5LX70 Gas Pipeline Steel”. Journal of Mechanical Engineering and Sciences 2 (1):237-50. https://doi.org/10.15282/jmes.2.2012.11.0022.