Fals, H. C., and R. E. Trevisan. “Implant Test and Acoustic Emission Technique Used to Investigate Hydrogen Assisted Cracking in the Melted Zone of a Welded HSLA-80 Steel”. Revista De Metalurgia, vol. 35, no. 4, Aug. 1999, pp. 233-41, doi:10.3989/revmetalm.1999.v35.i4.629.