Milkov T. CYBER SECURITY AND COUNTERMEASURE OF CYBER THREATS AT THE "MUNICIPALITY" LEVEL (ON THE EXAMPLE OF THE MUNICIPALITY OF RUSE). VFU [Internet]. 2024 May 14 [cited 2026 Feb. 23];(21):551-65. Available from: https://ejournal.vfu.bg/index.php/vfu/article/view/112