D. Nikolov, “DIGITAL TWINS AND VIRTUALIZED TESTBEDS FOR INVESTIGATING CYBERATTACKS AGAINST ELECTRIC POWER SYSTEMS”, VFU, no. 26, pp. 1018–1029, Oct. 2026, Accessed: Oct. 22, 2026. [Online]. Available: https://ejournal.vfu.bg/index.php/vfu/article/view/411