D. Dimitrov, “THREATS TO POWER TRANSMISSION SYSTEMS AS AN INSTRUMENT IN MODERN GREAT-POWER COMPETITION IN CYBERSPACE”, VFU, no. 26, pp. 1009–1017, Oct. 2026, Accessed: Oct. 22, 2026. [Online]. Available: https://ejournal.vfu.bg/index.php/vfu/article/view/410