VELMEZOVA, Ekaterina; KULL, Kalevi. On learning and education as discussed around the Tartu semiotics. Sign Systems Studies, [S. l.], v. 54, n. 1-2, p. 155–167, 2026. DOI: 10.12697/SSS.2026.54.1-2.09. Disponível em: https://ojs.utlib.ee/index.php/sss/article/view/29737. Acesso em: 26 oct. 2026.