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GUIZA AMAYA, J. S. ¿Actualizar ó vender su máquina antigua?. Informador Técnico, [S. l.], v. 69, p. 20–24, 2005. DOI: 10.23850/22565035.797. Disponível em: https://revistas.sena.edu.co/index.php/inf_tec/article/view/797. Acesso em: 24 mar. 2026.