MOKTEFI, A. Is Euler’s circle a symbol or an icon?. Sign Systems Studies, [S. l.], v. 43, n. 4, p. 597–615, 2015. DOI: 10.12697/SSS.2015.43.4.14. Disponível em: https://ojs.utlib.ee/index.php/sss/article/view/SSS.2015.43.4.14. Acesso em: 26 apr. 2024.