Kovalyov, M., N. Kovalyov, and S. Kovalyov. “Tunguska Explosion and the Earth’s Magnetic Field”. Geofizicheskiy Zhurnal 41, no. 3 (July 15, 2019): 211–213. Accessed March 30, 2025. https://journals.uran.ua/geofizicheskiy/article/view/173752.