BERGER, C. Copyleft statt Copyright?. Medienimpulse, [S. l.], v. 47, n. 1, 2010. DOI: 10.21243/mi-01-09-11. Disponível em: https://journals.univie.ac.at/index.php/mp/article/view/mi101. Acesso em: 11 apr. 2021.