EÍ­TO-BRUN, Ricardo. Free software: The key to information systems in Hispano-America. Anuario ThinkEPI, [S. l.], v. 2, p. 177–179, 2008. Disponível em: https://thinkepi.scimagoepi.com/index.php/ThinkEPI/article/view/32068. Acesso em: 7 may. 2026.