Rajesh H. Laniya, and Prof. K. K. Dudani. “Partial Discharge Detection and Localization in High Voltage Transformers Using an Acoustic Emission Technique”. International Journal of Advance Engineering and Research Development (IJAERD), vol. 2, no. 5, May 2015, pp. 250-6, https://ijaerd.org/index.php/IJAERD/article/view/823.