SÖDERBERG, J. Copyleft vs. Copyright: A Marxist Critique. First Monday, [S. l.], v. 7, n. 3, 2002. DOI: 10.5210/fm.v7i3.938. Disponível em: https://firstmonday.org/ojs/index.php/fm/article/view/938. Acesso em: 13 aug. 2022.