CHAMPAGNE, M. Axiomatizing umwelt normativity. Sign Systems Studies, [S. l.], v. 39, n. 1, p. 9–59, 2011. DOI: 10.12697/SSS.2011.39.1.01. Disponível em: https://ojs.utlib.ee/index.php/sss/article/view/SSS.2011.39.1.01. Acesso em: 19 apr. 2024.