SIERRA ARISTIZÁBAL, M. Basic logics with alternate affirmation and denial. Revista Universidad EAFIT, [S. l.], v. 41, n. 138, p. 84–95, 2012. Disponível em: https://publicaciones.eafit.edu.co/index.php/revista-universidad-eafit/article/view/858. Acesso em: 18 may. 2024.