M. I. Abdul-Razzak, “Some Aspect Dealing with VLF.EM Field Measurements”, ASRJETS-Journal, vol. 47, no. 1, pp. 88–102, Oct. 2018, Accessed: Sep. 20, 2025. [Online]. Available: https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/2684