“Freemium” business models in publishing. New packaging for the needs of readers in the digital age. Libellarium: journal for research in the field of information and related sciences , [S. l.], v. 8, n. 1, p. 81–89, 2015. DOI: 10.15291/libellarium.v8i1.216. Disponível em: https://morepress.unizd.hr/journals/index.php/libellarium/article/view/3697. Acesso em: 11 may. 2026.