Virtual systems in business and educational processes. Studia i Materiały Informatyki Stosowanej, [S. l.], v. 3, n. 4, p. 31–40, 2011. DOI: 10.34767/SIMIS.2011.04.04. Disponível em: https://czasopisma.ukw.edu.pl/index.php/smis/article/view/1593.. Acesso em: 23 nov. 2024.