Mydlikowski, Remigiusz, and Krzysztof Maniak. “Measurement of Electromagnetic Field Component Emissions As a Precursor of Emerging Hazard in Coal Mines”. Journal of Telecommunications and Information Technology 78, no. 4 (December 30, 2019): 30–35. Accessed April 16, 2026. https://jtit.pl/jtit/article/view/580.