KAŹMIERCZAK, Marek. Virtual Sender on the Net. An initial Categorization. Przestrzenie Teorii, [S. l.], n. 5, p. 213–241, 2007. DOI: 10.14746/pt.2005.5.14. Disponível em: https://pressto.amu.edu.pl/index.php/pt/article/view/11496. Acesso em: 18 jul. 2024.