RIZZOLATTI, G.; CRAIGHERO, L. Speculations on the origin of language. Gjornâl Furlan des Siencis - Friulian Journal of Science, Udine, Italy, v. 3, n. 5, p. 103–111, 2004. Disponível em: https://www.gfs-fjs.net/index.php/gsf/article/view/63. Acesso em: 3 may. 2025.