TO THE CONCEPT OF A PROTECTED OPERATION SYSTEM. Information systems and technologies security, [S. l.], v. 1, n. 1, p. 42–51, 2019. DOI: 10.17721/ISTS.2019.1.42-51. Disponível em: https://ists.knu.ua//article/view/2666. Acesso em: 16 feb. 2026.