Khan, M. T. I. I., A. A. Rashid, R. Hidaka, N. Hattori, and M. M. Islam. “Fatigue Crack Analysis of Ferrite Material by Acoustic Emission Technique”. Journal of Mechanical Engineering and Sciences, vol. 13, no. 2, June 2019, pp. 5074-89, doi:10.15282/jmes.13.2.2019.21.0418.