BRANDEV, A. Undercover investigation. Law Journal of New Bulgarian University, [S. l.], v. 19, n. 1, p. 104–111, 2023. DOI: 10.33919/ljnbu.23.1.8. Disponível em: https://ojs.nbu.bg/index.php/LJNBU/article/view/974. Acesso em: 30 may. 2025.