KŁOPOTEK, M.; JURSKI, P. Sieci zaufania. Studia Informatica. System and information technology, [S. l.], v. 4, n. 2, p. 83–103, 2004. Disponível em: https://czasopisma.uph.edu.pl/studiainformatica/article/view/2886. Acesso em: 25 apr. 2024.