Hrozovskij , Roman, Sergii Voloshko, Sergii Gnatiuk, and Lev Sakovych. “Complex Assessment of the Communications System Efficiency”. Political Science and Security Studies Journal 1, no. 2 (December 31, 2020): 77-85. Accessed October 16, 2025. http://psssj.eu/index.php/ojsdata/article/view/23.