JONKHEER, Kees. Digital diploma mills: A dissenting voice. First Monday, [S. l.], v. 4, n. 7, 1999. DOI: 10.5210/fm.v4i7.681. Disponível em: https://firstmonday.org/ojs/index.php/fm/article/view/681. Acesso em: 28 mar. 2024.