KOIBICHUK, Vitaliia; GERASYMENKO, Valery. Effectiveness of National Cyber Security: DEA analytics. Herald of Economics, [S. l.], n. 3, p. 8–21, 2022. DOI: 10.35774/visnyk2022.03.008. Disponível em: https://visnykj.wunu.edu.ua/index.php/htneu/article/view/1373.. Acesso em: 19 apr. 2025.