OHARKOV, A. S.; VASETSKYI, E. H.; MOROZOV, H. L.; KUKHLIVSKYI, S. V. Compulsory authorization in the Internet. Science and Transport Progress , [S. l.], n. 36, p. 189–193, 2011. DOI: 10.15802/stp2011/9350. Disponível em: https://stp.ust.edu.ua/article/view/9350. Acesso em: 4 may. 2024.