Negi, J. G., and P. D. Saraf. “Multifrequency Electromagnetic Response of a Shielded Conductor”. Geofisica Internacional 23, no. 1 (January 1, 1984): 1–15. Accessed July 23, 2024. http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1009.